If a process is ARIMA(0,d,q), number of significant correlations in ACF plot tells the value of q.
A. True
B. False
How to estimate d in ARIMA(p,d,q) model?
A. Take random guess and keep trying until you find the optimal solution.
B. First try d=0 and note the error. Then try d =1 and note the error and then try d=2 and not the error. whichever d gives you lowest error in ARIMA model, use that d.
C. Use ADF test or KPSS test to determine if d makes the time series stationary or not. If not, increment d by 1.
D. Use ACF and PACF to estimate approximate d.
Augmented Dickey Fuller Test is used to prove randomness of the residuals of a forecasting method.
A. True
B. False
Augmented Dickey Fuller Test is used to prove randomness of the residuals of a forecasting method.
A. True
B. False
What is the naïve method forecast of following time series (1,7,2,7,2,1) for period 7?
A. 7
B. 1
C. 2
D. 3/2
If the difference between each consecutive term in a time series is constant, we call it Drift Model.
True
False
If the difference between each consecutive term in a time series is random, we call it random walk model.
True
False
If data exhibits quarterly seasonality, what is the seasonal naïve method forecast of following time series (4,1,3,2,5,1,2) for period 8?
A. 3
B. 1
C. 5
D. 2
E. 4
33. What command allows sub setting (cutting the time series into a smaller time series) of a time series in R ?
A. subset
B. cut
C. window
D. view
Which method of measure error is NOT appropriate when forecasting temperature time series which can have a real zero value?
A. RMSE
B. MAPE
C. MAE
D. MASE
Answers
B. False. The number of significant correlations in the PACF plot tells the value of q in an ARIMA(0,d,q) model.
To estimate d in an ARIMA(p,d,q) model, option C is correct.
B. False.
The naïve method forecast for period 7 in the given time series (1,7,2,7,2,1) would be 1.
False. If the difference between each consecutive term in a time series is constant, we call it a trend model.
B. MAPE. MAPE is not appropriate when dealing with time series
We can use either the ADF test or KPSS test to determine if d makes the time series stationary or not. If the time series is non-stationary, we increment d by 1 and repeat the test until we achieve stationarity.
B. False. The Augmented Dickey Fuller Test is used to determine whether a time series has a unit root or not, which in turn helps us in determining whether it is stationary or not. It does not prove randomness of residuals.
The naïve method forecast for a time series is simply the last observed value. Therefore, the naïve method forecast for period 7 in the given time series (1,7,2,7,2,1) would be 1.
False. If the difference between each consecutive term in a time series is constant, we call it a trend model.
True. If the difference between each consecutive term in a time series is random, we call it a random walk model.
The seasonal naïve method forecast for a time series is simply the last observed value from the same season in the previous year. Therefore, the seasonal naïve method forecast for period 8 in the given time series (4,1,3,2,5,1,2) would be 4.
A. subset
B. MAPE. MAPE is not appropriate when dealing with time series that have real zero values because of the possibility of division by zero, \which can lead to undefined values. RMSE, MAE, and MASE are suitable
for temperature time series.
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Related Questions
briefly describe the working of computer processing system?
explanation too please short note:-
Answers
The
scope statement and work break down structure for renowation of
living room
tell me what changes should be in living room takes place in
budget of 20000 dollars
Answers
Renovating a living room on a budget of $20,000 requires a carefully planned scope statement and work breakdown structure.
The scope statement should outline the overall objectives and boundaries of the project, while the work breakdown structure should break the project down into smaller, more manageable tasks to ensure that everything is completed on time and within budget.
Changes that should be made in a living room renovation within the budget of $20,000 are as follows:
1. Flooring: The flooring in the living room should be updated to a modern, low-maintenance option. Hardwood flooring is a popular choice that is both durable and visually appealing.
2. Walls: The walls in the living room should be repainted to give the space a fresh, new look. Neutral colors such as gray, beige, and white are all popular options that can help to brighten up the room and make it feel more inviting.
3. Lighting: Upgrading the lighting fixtures in the living room can help to create a more comfortable and inviting space. Recessed lighting, for example, can add a modern touch to the room and help to highlight key areas.
4. Furniture: Replacing old furniture with new pieces can help to transform the look of the living room. Comfortable seating options such as sofas and armchairs can help to create a welcoming atmosphere and make the room feel more inviting.
5. Accessories: Adding accessories such as throw pillows, curtains, and artwork can help to tie the look of the room together and make it feel more cohesive. These items can be purchased relatively inexpensively and can help to give the living room a more personalized look and feel.
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a customer in a store is purchasing three items. write a program that asks for the price of each item, then displays the subtotal of the sale, the amount of sales tax, and the total. assume the sales tax is 7 percent. the data type input from the user is float. once the user inputs the prices for the three items, your program will compute subtotal, the tax, and the total. the subtotal is the sum of total of the prices of the three items. the tax is computed based on the sales tax of 7 percent. the total is the subtotal plus tax. sample run: enter price for item 1:100 enter price for item 2:200 enter price for item 3:350 ----------------------- item 1
Answers
To write a program that calculates the subtotal, sales tax, and total for a customer purchasing three items, we can use the following steps:
1. First, we need to prompt the user to enter the price of each item. We can use the input() function to do this.
2. Once we have the prices of the three items, we can calculate the subtotal by adding the prices together.
3. To calculate the sales tax, we need to multiply the subtotal by 7% (0.07).
4. Finally, we can calculate the total by adding the subtotal and the sales tax together.
Here is the program in Python:
```
item1 = float(input("Enter price for item 1: "))
item2 = float(input("Enter price for item 2: "))
item3 = float(input("Enter price for item 3: "))
subtotal = item1 + item2 + item3
tax = subtotal * 0.07
total = subtotal + tax
print("Subtotal: $", subtotal)
print("Sales tax: $", tax)
print("Total: $", total)
```
When the user runs the program and enters the prices of the three items, the program will calculate and display the subtotal, sales tax, and total for the sale. For example:
```
Enter price for item 1: 100
Enter price for item 2: 200
Enter price for item 3: 350
Subtotal: $ 650.0
Sales tax: $ 45.5
Total: $ 695.5
```
This program can be easily modified to handle more items by adding more input statements and adjusting the subtotal calculation accordingly.
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How is communication different from data transfer?
A) Communication includes more than one party; data transfer only includes one party.
B) Communication includes e-mails and voice calls; data transfer includes downloading files and streaming.
C) Communication includes voluntary data transfer; data transfer includes unknowingly sharing information with strangers.
D)Communication includes permanently sharing information; data transfer includes temporarily sharing information.
Answers
Answer:
B) Communication includes e-mails and voice calls; data transfer includes downloading files and streaming.
Explanation:
Communication can be defined as a process which typically involves the transfer of information from one person (sender) to another (recipient), through the use of semiotics, symbols and signs that are mutually understood by both parties. One of the most widely used communication channel or medium is an e-mail (electronic mail).
The linear model of communication comprises of four (4) main components and these are; sender, message, channel and receiver (recipient).
Data transfer can be defined as the transmission of analogue or electronic data such as pictures, music, videos, texts, etc., from one computer node to another computer system through the use of various techniques and technologies.
Communication differs from data transfer in the sense that communication involves the use of channels such as e-mails and voice calls while data transfer includes downloading files and streaming over a Transmission Control Protocol and Internet Protocol (TCP/IP) network, through the use of a file transfer protocol (FTP) on port number 20 or 21.
the more spread out the data is
Population variance measures the spread of the data, not the center. (True or False)
Answers
The more spread out the data is population variance measures the spread of the data, not the center. The given statement is true.
Population variance is a statistical term that measures the dispersion or spread of a set of data points in a population. It does not provide information about the center of the data, such as the mean or median.
Instead, it calculates the average of the squared differences between each data point and the mean of the entire population. A higher population variance indicates that the data points are more spread out, whereas a lower variance means the data points are more closely grouped around the mean.
Population variance is used to measure the spread of the data in a population, and it does not give any information about the center of the data. Therefore, the statement is true.
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the hardware implementation of a program uses three different classes of instructions: 4 of class a, 2 of class b, and 3 of class c, that require 1, 1.5, and 2 cycles, respectively (table below). this program is run on processor cpu a which has a clock rate 4.8 ghz and processor cpu b that is 25% slower than cpu a. what is the cpi (cycles per instruction) for the program? what is the execution time for the program on cpu a? what is the clock cycle time of cpu b?
Answers
Cycle count for the first code is equal to (10 cycles)(2 × 1)+(1 × 2)+(2 × 3) Number of cycles for second code = ((4 × 1) + ((1 × 2) + ((1 × 3)) = 9 cycles 10/9=1.11 times CPI for the first code, which is 10/5=2. CPI for the second code is 9 / 6 = 1.5.
What are the 3 things the CPU does to instructions?Processor operations include fetch, decode, execute, and write back. These are the four main tasks that a processor performs. Getting instructions from programme memory via a system's RAM is known as fetching.
The P1 processor runs at 3 GHz and has a 1.5 CPI. P2 has a CPI of 1.0 and a 2.5 GHz clock rate. P3 has a CPI of 2.2 and a 4.0 GHz clock rate. In comparison to the M1, the M2 offers 18% more multicore CPU performance, up to two additional GPU cores, a 50% increase in memory bandwidth, 25% more graphics performance at the same power level as M1 and up to 35% more performance at its maximum, a 25% increase in transistor count, and 2.3x faster performance at the same power.
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OBJECTIVE As a result of this laboratory experience, you should be able to accomplish Functions and proper handling of hand tools in automotive workshop Functions and proper handling of power tools in automotive workshop (5 Marks)
Answers
The objective of the laboratory experience is to develop the knowledge and skills necessary for performing functions and proper handling of hand tools and power tools in an automotive workshop.
In the laboratory experience, students will be exposed to various hand tools commonly used in an automotive workshop. They will learn about the functions of different hand tools such as wrenches, screwdrivers, pliers, and socket sets. The importance of proper handling, including correct gripping techniques, applying appropriate force, and ensuring tool maintenance and safety, will be emphasized. Students will also understand the specific applications of each tool and how to use them effectively for tasks like loosening or tightening fasteners, removing or installing components, and performing basic repairs.
Additionally, the laboratory experience will cover the functions and proper handling of power tools in an automotive workshop. Students will learn about power tools such as impact wrenches, drills, grinders, and pneumatic tools. They will gain knowledge on how to operate these tools safely, including understanding their power sources, selecting the right attachments or bits, and using them for tasks like drilling, grinding, sanding, or cutting. Proper safety measures, such as wearing personal protective equipment and following manufacturer guidelines, will be emphasized to ensure the safe and efficient use of power tools in the automotive workshop setting.
Overall, this laboratory experience aims to equip students with the necessary knowledge and skills to effectively and safely handle hand tools and power tools in an automotive workshop.
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Write output of the given program:
Answers
Answer:
program 655555555555555
Why did my fire alarm randomly go off in the middle of the night.
Answers
Fire alarms are important safety devices designed to alert occupants of potential fire hazards. However, sometimes they can go off randomly, even without an actual fire threat.
There are several reasons why a fire alarm may randomly go off in the middle of the night:
1. Low battery: If the fire alarm is battery-operated, a low battery can cause it to emit a warning sound, which could be mistaken for an actual alarm. In this case, it is important to replace the battery.
2. Dust or debris: Dust, dirt, or other debris might have accumulated in the fire alarm, causing it to falsely detect smoke or heat. Regular cleaning of the alarm can help prevent this issue.
3. Malfunction: Sometimes, a fire alarm can malfunction and go off randomly. This could be due to a manufacturing defect, age, or other factors.
4. Humidity or steam: High humidity or steam from activities such as showering or cooking can also trigger a fire alarm. Ensuring proper ventilation in these areas can help prevent false alarms.
To determine the exact cause of the random activation, it is important to check your fire alarm for any signs of the issues mentioned above. Regular maintenance, including cleaning and battery replacement, can help ensure that your fire alarm operates efficiently and accurately. If the problem persists, consider consulting a professional to assess and resolve the issue.
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In order for two queries to be UNION-compatible, they must: Select one: A. both have the same number of lines in their SQL statements. B. both output compatible data types for each column and return the same number of rows. C. both return at least one row. D. both return exactly one row.
Answers
Answer: B. both output compatible data types for each column and return the same number of rows.
Explanation:
In order for two queries to be UNION-compatible, they must be both output compatible data types for each column and return the same number of rows.
It should be noted that two relations are union compatible when both relations have the same attributes and also the domain regarding the identical attributes are thesame.
If costs of goods sold for a fiscal year are $125,000,000, markup is 10%, and inventory turns are 32.5, then its average aggregate value of inventory was $__________. 3,461,538 3,846,154 4,230,769 None of these figures is correct
Answers
The average aggregate value of inventory was $3,846,154
So, the correct answer is B.
To find the average aggregate value of inventory, we first need to determine the annual sales revenue.
Given the cost of goods sold (COGS) is $125,000,000 and the markup is 10%, we can calculate the sales revenue as follows:
Sales revenue = COGS / (1 - markup) = $125,000,000 / (1 - 0.1) = $125,000,000 / 0.9 = $138,888,889
Next, we'll use the inventory turns, which is the ratio of COGS to the average aggregate value of inventory: Inventory turns = COGS / Average inventory value
Using the given inventory turns (32.5) and the COGS, we can solve for the average inventory value:
32.5 = $125,000,000 / Average inventory value
Average inventory value = $125,000,000 / 32.5 = $3,846,154
Hence, the answer of the question is B.
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Katie is training for a marathon and wants to run a
total of 460 miles in four months. If she runs an
equivalent amount of miles each month. How many
total miles is she running per month?
Answers
Answer: 115 miles a month
Explanation:
460/4
which equals
115 miles per month
Hey i need some help with code.org practice. I was doing a code for finding the mean median and range. the code is supposed to be including a conditional , parameter and loop. I'm suppose to make a library out of it and then use the library to test the code? please help!
here is the link to the code.
https://studio.code.org/projects/applab/YGZyNfVPTnCullQsVFijy6blqJPMBOgh5tQ5osNhq5c
P.S. you cant just type on the link i shared you have to click view code and then remix to edit it. thanks
Answers
Answer:
https://studio.code.org/projects/applab/YGZyNfVPTnCullQsVfijy6blqJPMBOgh5tQ5osNhq5c
Explanation:
Take one action in the next two days to build your network. You can join a club, talk to new people, or serve someone. Write about this action and submit this as your work for the lesson. icon Assignment
Answers
Making connections is crucial since it increases your versatility.You have a support system of people you can turn to when things get tough so they can help you find solutions or in any other way.
What are the advantages of joining a new club?
Support Network - Joining a club or organization can help you develop a support network in addition to helping you make new acquaintances and meet people.Your teammates and friends will be there for you not only during practice but also amid personal difficulties. Working collaboratively inside a group, between groups, between communities, or between villages is known as network building.One method of creating a network is by forming a group. Attending events and conferences and developing connections with other attendees and industry speakers is one of the finest methods to build a strong network.In fact, the framework of many networking events and conferences encourages networking and connection opportunities. Personal networking is the process of establishing connections with organizations or individuals that share our interests.Relationship growth often takes place at one of the three levels listed below:Networks for professionals.Neighborhood networks.Personal networks. Reaching out is part of an active communication process that will help you learn more about the other person's interests, needs, viewpoints, and contacts.It is a life skill that needs to be actively handled in order to preserve or, more importantly, to advance a prosperous profession. various network types.PAN (personal area network), LAN (local area network), MAN (metropolitan area network), and WAN (wide area network) are the different types of networks.To learn more about network refer
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Information taken directly from an existing classified source and stated verbatim in a new or different document is an example of ______a.Restatingb.Extractingc.Generatingd.Paraphrasing
Answers
When information is taken from a legitimate source and rewritten in a new or different document, it is referred to as paraphrasing or restating.
Subordinate classifiers should be cautious while rewording or rehashing data to guarantee that the characterization has not been changed simultaneously. When information is taken directly from a legitimate classification guidance source and rewritten in a new or different document, this is called extracting. When information is taken from a legitimate source and rewritten in a new or different document, it is referred to as paraphrasing or restating. The following are the terms that are included in this set: the procedure of utilizing previously classified information to create new documents or materials and marking the new materials in a manner that is consistent with the classification markings that are affixed to the information that is used as the source.
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write a statement that calls the recursive function backwards alphabet() with input starting letter. sample output with input: 'f' f e d c b a
Answers
Using the knowledge in computational language in python it is possible to write a code that write a statement that calls the recursive function backwards alphabet() with input starting letter.
Writting the code:def backwards_alphabet(n):
if ord(n) == 97:
return n
else:
return n + backwards_alphabet(ord(n-1))
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write a line of code that prompts the user for his or her name and saves the user's input in a variable called name.
Answers
Python's input() function and print() function are used to read values from the console and show information there, respectively. The code is
name = input("Enter your name:")
print(name)
Using Python, we get input from the user using the input() function and output is displayed on the screen using the print() function. Users can supply the application with any information in the form of texts or numbers by using the input() function.
The specified message is shown on the screen via the print function. For example, print ("Hello") produces the word Hello. In contrast, input functions receive provided data. For instance, the output of input = "Enter your age:" is Enter your age, and your age is taken into account when you press the Enter key.
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Computer has brought radical change in every field
Answers
Answer:
Yes it has brought change in every field
Explanation:
jelaskan tiga kemungkinan sebab pengasah pensil itu tidak dapat berfungsi secara tiba-tiba (translate: explain three possible reasons why the pencil sharpener may not work suddenly) pls help me
Answers
Explanation:
Internal gear wear must be significant (visually obvious) to be the cause of off-center sharpening. Cutter carrier is rotating but the pencil is not sharpening (doesn't feel like the cutter is engaging the pencil) This is usually caused by a foreign object (e.g., an eraser or broken pencil lead) inside the pencil bore.
An IP subnetting design effort is under way at a company. So far, the senior engineer has decided to use Class B network 172.23.0.0. The design calls for 100 subnets, with the largest subnet needing 500 hosts. Management requires that the design accommodate 50 percent growth in the number of subnets and the size of the largest subnet. The requirements also state that a single mask must be used throughout the Class B network. How many masks meet the requirements
Answers
Answer:
The answer is "0".
Explanation:
The mask should describe sufficient subnet bits for build 150 subnet masks with 50% development. The Mask thus needs a minimum of 8 subnet bits (7 subnet bits supply 27, or 128, subnets, and 8 subnet bits supply 28, or 256, subnets). Similarly, such a need to grow by 50% of its size of the main subnet needs, that host part to amount to 750 hosts/subnet. There's not enough 9 host bits (29 - 2 = 510), yet 10 network bits have 1022 host(s)/subnet (210 – 2 = 1022). This same maximum mask project requires to be 34 bits, (at least) in the form of 16 network bits, because of the Class B network, but there are only 32 bits, therefore no single mask meets its requirements.
Steps in saving an excel work book
Answers
Steps in saving an excel work book
꧁༒Answer༒꧂
1.Click File > Save as
2.Under save as, pick place where
you want to save your workbook.
3.click browse to find the location you
want in your documents folder.
4.in the file name box, enter a name for a
new workbook.
5.To save your workbook in a different
file format(like.
6.Click save
Can you all help me with this?
Answers
Answer:
(1)mobile smart phone.
(2)server computer.
(3)desktop computer
(4)laptop computer
(5)all in one computer
2. Read the following scenarios about how three different programmera approach
programming a computer game. Identify which type of programming design
approach each represents (3 points):
a) Yolanda first breaks down the whole game she needs to program into modules.
She then breaks these modules into smaller modules until the individual parts are
manageable for programming. She writes the smallest modules, and then
recombines them into larger parts.
b) Isabella takes the game process and groups together sets of related data involved
in the process. She then identifies the messages the data should respond to. After
writing the code for each set of data, Isabella then combines, tests, and refines the
subsets until the software runs properly
Answers
a.) Structured programming
b.) Object-oriented programming
c.) Top-down programming
The programming design approach represented in this scenario is modular programming. The programming design approach represented in this scenario is object-oriented programming.
What is programming?The process of creating a set of instructions that tells a computer how to perform a task is known as programming.
Computer programming languages such as JavaScript, Python, and C++ can be used to create programs.
Modular programming is the programming design approach represented in this scenario.
Yolanda divides the entire game into modules, which are then subdivided further into smaller modules until the individual parts are manageable for programming.
Object-oriented programming is the programming design approach represented in this scenario. Isabella organizes sets of related data and determines which messages the data should respond to.
Thus, this method entails representing data and functions as objects and employing inheritance and polymorphism to generate flexible and reusable code.
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What design element includes creating an effect by breaking the principle of unity?
Answers
Answer:
Sorry
Explanation:
Computer chip
what is created once based on data that does not change? multiple choice question. A) Static report
B) Data report
C) Dynamic report
Answers
The correct option is A) Static report .A static report is created once based on data that does not change.
A static report refers to a document or presentation that is generated from a specific set of data at a particular point in time and remains unchanged thereafter. It is typically used to present historical or fixed information that does not require real-time updates. Static reports are commonly used in business, research, and other fields to summarize data, present findings, or communicate information to stakeholders.
Static reports are created by collecting and analyzing data, organizing it in a meaningful way, and then presenting the results in a report format. The data used in a static report is typically derived from sources such as surveys, databases, or historical records. Once the report is generated, it remains static and does not automatically update when new data becomes available.
These reports are valuable when there is a need to capture a snapshot of information or analyze historical trends. They can be shared electronically or in printed form, providing a reference point for decision-making or documentation purposes. However, it is important to note that static reports may become outdated as new data emerges, and they may require periodic updates or revisions to remain relevant.Therefore, correct option is A) Static report.
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Jon wants to set up a trihomed DMZ. Which is the best method to do so? A. use dual firewalls B. use a single firewall with only two interfaces C. use a single three-legged firewall with three interfaces D. use dual firewalls with three interfaces
Answers
Answer:
The correct option is C) Use a single three-legged firewall with three interfaces
Explanation:
DMZ is an acronym for a demilitarized zone.
A DMZ network is one is situated between the internal network and the Internet. It is supported by an Internet Security and Acceleration (ISA) server.
The interfaces you'd get with the DMZ network are
A public network (Internet Protocol-IP) address with a public interfaceAn internal network interface with a private network (IP) address A DMZ interface with a public network (IP) addressUnlike the back-to-back DMZ settings, a trihomed DMZ is unable to use private IP addresses. To use the trihomed DMZ, public IP addresses are a must suitable requirement.
Cheers!
Computer _ rely on up to date definitions?
A. Administrators
B. Malware Scan
C. Firmware updates
D. Storage Drivers
Answers
Answer: The correct answer is B. Malware Scan
Explanation:
The word "definition" only applies to antivirus and malware removal applications that scan for patterns using the definitions. The other choices do not use definitions. Firmware updates rely on images, storage drives use drivers and administrators are user privilege type.
IM can only be sent to conacts who are currently
Answers
what is the question???
How did tribes profit most from cattle drives that passed through their land?
A.
by successfully collecting taxes from every drover who used their lands
B.
by buying cattle from ranchers to keep for themselves
C.
by selling cattle that would be taken to Texas ranches
D.
by leasing grazing land to ranchers and drovers from Texas
Answers
The way that the tribes profit most from cattle drives that passed through their land is option D. By leasing grazing land to ranchers and drovers from Texas.
How did Native Americans gain from the long cattle drives?When Oklahoma became a state in 1907, the reservation system there was essentially abolished. In Indian Territory, cattle were and are the dominant economic driver.
Tolls on moving livestock, exporting their own animals, and leasing their territory for grazing were all sources of income for the tribes.
There were several cattle drives between 1867 and 1893. Cattle drives were conducted to supply the demand for beef in the east and to provide the cattlemen with a means of livelihood after the Civil War when the great cities in the northeast lacked livestock.
Lastly, Abolishing Cattle Drives: Soon after the Civil War, it began, and after the railroads reached Texas, it came to an end.
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Cuales son los dos tipos de mantenimiento que existen?
Answers
Answer:
dpendiendo del trabajo a realizar, se pueden distinguir tres tipos de mantenimiento: preventivo, correctivo y predictivo.
Preventivo. Tareas de mantenimiento que tienen como objetivo la reducción riesgos. ...
Correctivo. ...
Predictivo. ...
Mantenimiento interno. ...
Mantenimiento externo
La clasificación más extendida se refiere a la naturaleza de las tareas, y así, el mantenimiento puede distinguirse en correctivo, preventivo, conductivo, predictivo, cero horas, y modificativo
Tareas de mantenimiento programado: lo componen el conjunto de tareas de mantenimiento que tienen por misión mantener un nivel de servicio determinado en los equipos, programando las revisiones e intervenciones de sus puntos vulnerables en el momento más oportuno
Explanation:espero haberte ayudado coronita plis soy nueva en esto