"Correlational" research looks at how variables vary with each other, while "experimental" research looks at how one variable causes a change in another variable.
What is correlational research?Research is a form of non-experimental methodology in which a researcher measures 2 factors and analyzes and evaluates the statistical relationship among them without the influence of any other variable.
Some key features regarding the correlational research are-
The correlation coefficient (a statistical technique that determines the strength of the connection between two variables) shows this same correlation between two variables, with a value ranging from -1 to +1. A positive correlation exists between the two variables so when correlation coefficient is close to +1. If the value is close to -1, the two variables have a negative correlation. Whenever the value is close to zero, the two variables have no relationship.To know more about the correlational research, here
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Use >, <, or = to make the following statement true. 4 4/5 + 3 2/3 ________ 8 1/2
The complete true mathematical statement is 4 4/5 + 3 2/3 < 8 1/2
How to make the mathematical statement true?From the question, we have the following parameters that can be used in our computation:
4 4/5 + 3 2/3 ________ 8 1/2
Evaluate the sum of the integer parts of the fractions
So, we have the following representation
7 4/5 + 2/3 ________ 8 1/2
Next, we take the LCM of 5 and 3 and evaluate the sum
This gives
7 (12 + 10)/15 ________ 8 1/2
Evaluate the sum of 12 and 10
So, we have
7 (22)/15 ________ 8 1/2
Simplify
7 + 1 7/15 ________ 8 1/2
Add 7 and 1
8 7/15 ________ 8 1/2
7/15 is less than 1/2
So, we have
8 7/15 < 8 1/2
Hence, the operator that completes the statement is <
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A confectionery company mixes three types of toffees to form one kilogram " toffee packs. the pack is sold at rs. 17. the three types of toffees cost rs.20, rs. 10, rs. 5 per kg. resp. the mixture must contain atleast 300 gms of first type. also weight of first two types must be at least be equal to weight of third type. find the optimal mix for maximum profit.answer
The maximum profit is 6 and it is obtained when we mix 0.6 kg of type A, 0 kg of type B, and 0.4 kg of type C.
The optimal mix for the maximum profit can be found as follows:
The company mixes three types of toffees, A, B, and C. Let the weights of type A, B, and C be a, b, and c kg, respectively. Let us assume that we are making 1kg of toffee pack. Therefore, the weight of type C should be 1 - (a + b) kg. Also, the mixture must contain at least 300 gms of type A i.e a >= 0.3 kg
Also, the weight of the first two types (A and B) must be at least equal to the weight of type C, i.e a + b >= c. This condition can also be written as a + b - c >= 0
Let us now calculate the total cost of making 1kg of toffee pack.
Cost = 20a + 10b + 5c
If the pack is sold at Rs. 17, then the profit per 1kg of toffee pack is by
Profit = Selling Price - Cost = 17 - (20a + 10b + 5c)
Now we have the following linear programming problem:
Maximize P = 17 - (20a + 10b + 5c)
Subject to constraints: a + b + c = 1 (since we are making 1kg of toffee pack)
a >= 0.3a + b - c >= 0a, b, c >= 0
We can use the simplex method to solve this linear programming problem. However, to save time, we can solve it graphically. The feasible region is as follows:
We can see that the corner points of the feasible region are: (0.3, 0, 0.7), (0.6, 0, 0.4), (0, 0.5, 0.5), and (0, 1, 0).
Let us calculate the profit at each of these corner points. For example, at the point (0.3, 0, 0.7), we have a = 0.3, b = 0, and c = 0.7. Therefore, the profit is
P = 17 - (20(0.3) + 10(0) + 5(0.7)) = 3.5
Similarly, we can calculate the profit at the other corner points as well. The corner point (0.3, 0, 0.7) gives a profit of 3.5
Corner point (0.6, 0, 0.4) result in a profit of 6
Corner point (0, 0.5, 0.5) results in a profit of 5
Corner point (0, 1, 0) gives a profit of 3
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7. Fill in the blanks within the tables
to make the functions odd.
Following is the odd function table of the given problem:
x y
-3 11
-1 2
0 0
1 -2
3 -11
How may a function be made odd?If f(-x) = f, then a function f(x) is even (x). If f(-x) = -f, the function is odd (x). There is reflection symmetry about the y-axis for an even function. Rotational symmetry about the origin exists for odd functions.
An odd function table is what?
The symmetry of even functions around the y-axis is f(x)=f (-x). The x- and y-axes are symmetrical for odd functions: f(x)=-f (-x). Let's apply these definitions to discover whether a table-based function is even, odd, or neither.
For the given table,
odd function table is -
x y
-3 11
-1 2
0 0
1 -2
3 -11
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Jutin chooe a function o that when he ue the number 7 a an input, the output i 20. Which function could he ue?
A. F(x)=2x5
B. G(x)=x^2-19
C. H(x)=13-x
D. J(x)=3x-1
HELP PLEASE!!!
Jutin chooses a function J(x) = 3x - 1 that when he uses the number 7 as an input, then the output is 20.
As per the given data, Jutin chooses a function in which he uses the number 7 as an input, then the output is 20.
Here we have to determine which function Jutin has to use.
Now we have to substitute the value that x = 7 in all the given functions.
First function:
F(x) = 2\(x^{5}\)
F(7) = 2 \((7)^{5}\)
F(7) = 2 (16807)
F(7) = 33614 which is not equal to 20.
Second function:
G(x) = \(x^{2}\) - 19
F(7) = \((7)^{2}\) - 19
F(7) = 49 - 19
F(7) = 30 which is not equal to 20.
Third function:
H(x) = 13 - x
H(7) = 13 - 7
H(7) = 6 which is not equal to 20.
Fourth function:
J(x) = 3x - 1
J(7) = 3(7) - 1
J(7) = 21 - 1
J(7) = 20
The correct function is J(x) = 3x - 1
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a die is tossed 180 times with the following results: x 1 2 3 4 5 6 f 28 36 36 30 27 23 is this a balanced die? use a 0.01 level of significance
Based on the chi-square test, there is no significant evidence to suggest that the die is not balanced.
We have,
To determine if the die is balanced, we can perform a chi-square test of goodness of fit.
The null hypothesis is that the die is balanced, and the alternative hypothesis is that the die is not balanced.
First, let's calculate the expected frequencies for each outcome assuming the die is balanced. Since there are 180 tosses in total, each outcome is expected to have an equal probability of 1/6.
Expected frequency for each outcome
= (Total tosses) x (Probability of each outcome)
Expected frequency for each outcome = (180) x (1/6)
Expected frequency for each outcome = 30
Now, we can calculate the chi-square test statistic using the formula:
χ² = Σ [(Observed frequency - Expected frequency)² / Expected frequency]
Let's calculate the chi-square test statistic:
χ² = [(28 - 30)² / 30] + [(36 - 30)² / 30] + [(36 - 30)² / 30] + [(30 - 30)² / 30] + [(27 - 30)² / 30] + [(23 - 30)² / 30]
χ² = [(-2)² / 30] + [(6)² / 30] + [(6)² / 30] + [(0)² / 30] + [(-3)² / 30] + [(7)² / 30]
χ² = 4/30 + 36/30 + 36/30 + 0/30 + 9/30 + 49/30
χ² = 134/30
χ² ≈ 4.467
Next, we need to compare the calculated chi-square value to the critical chi-square value at a significance level of 0.01 and degrees of freedom equal to the number of outcomes minus 1 (6 - 1 = 5).
Looking up the critical chi-square value in a chi-square distribution table with 5 degrees of freedom and a significance level of 0.01, we find it to be approximately 15.086.
Since the calculated chi-square value (4.467) is less than the critical chi-square value (15.086), we fail to reject the null hypothesis.
Therefore, we do not have sufficient evidence to conclude that the die is not balanced at a 0.01 level of significance.
Thus,
Based on the chi-square test, there is no significant evidence to suggest that the die is not balanced.
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hello this is what I'm working on on my homework questions and would like to do a couple of practice questions thank you
Edna watches TV for 2 to 7 hours every week, depending on how busy she is. If you look at a
log of the amount of time she spends watching TV weekly, what kind of sequence will you
see?
We would see a logarithmic sequence of values if we plotted the amount of time Edna spends watching TV weekly on a logarithmic scale.
If we plot the amount of time Edna spends watching TV on a logarithmic scale, we would see a continuous sequence of values that increase as her viewing time increases. Specifically, the sequence would be a logarithmic scale of the number of hours she watches TV per week.
On a logarithmic scale, each increment corresponds to a multiplication by a constant value. For example, if we use a logarithmic scale base 10, then each increment of 1 corresponds to a multiplication by 10. So, if we plot Edna's TV watching time on a logarithmic scale, we would see a sequence of values that increase by a factor of 10 as her TV watching time increases by an order of magnitude.
For example, if Edna watches 2 hours of TV per week, the logarithmic value would be log(2) = 0.3. If she watches 7 hours per week, the logarithmic value would be log(7) = 0.85. If she watches 20 hours per week, the logarithmic value would be log(20) = 1.3. As her viewing time increases, the logarithmic values would continue to increase in a continuous sequence.
Therefore, if we plotted the amount of time Edna watches TV each week on a logarithmic scale, we would see a logarithmic sequence of numbers.
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This graph shows the height in inches, , of a bamboo plant months after it has been planted.
Your equation: h=3t+12
After how many months will the bamboo plant be inches tall?
Use the sketch tool if it helps to support your thinking.
The number of months it would take the bamboo plant to be 66 inches tall is 18 months.
How to determine an equation of this line?In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical equation (formula):
y - y₁ = m(x - x₁)
Where:
m represent the slope.x and y represent the points.First of all, we would determine the slope of this line;
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
Slope (m) = (24 - 12)/(4 - 0)
Slope (m) = 12/4
Slope (m) = 3
At data point (0, 12) and a slope of 3, a linear equation in slope-intercept form for this line can be calculated by using the point-slope form as follows:
y - y₁ = m(x - x₁)
y - 12 = 3(x - 0)
y = 3x + 12 ≡ h = 3t + 12
When y = 66 inches, the number of months can be calculated as follows;
h = 3t + 12
66 = 3t + 12
3t = 54
t = 54/3
t = 18 months.
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
What is [(10-3) to the power of 2 + 15] divided by 4
Answer:
It is 16
Step-by-step explanation:
[(10-3)^2 + 15]/4
[(7)^2 + 15]/4
[49+15]/4
[64]/4
= 16
Use your calculator to work out
162 – 17
V2.3 + 5.87
Write down your full calculator display.
9514 1404 393
Answer:
answer: 83.6155157107
Step-by-step explanation:
See attached.
__
Most calculators will require that you enclose the numerator in parentheses. You may or may not need to do that for the square root function and denominator as well.
_____
My calculator uses RPN, so the sequence of keys would be ...
16 . . . x^2
17 . . . - (minus) . . . displaying 239
2.3 . . . enter
5.87 . . . + . . . displaying 8.17
√ . . . . displaying 2.85832118559
÷ . . . . displaying 83.6155157107
This kind of calculator gives me complete control over the way the calculation is done, so no parentheses are needed. (The number 239 simply waits for the ÷ operation.)
Some "algebraic" calculators do not conform to the Order of Operations, and some do not have enough memory for pending operations. The manual doesn't always point out the limitations.
I like the G.oogle calculator because it is guaranteed to conform to the Order of Operations. That requires you to know where to use parentheses. Its final display always uses parentheses to show exactly how it did the computation.
the degree to which an instrument appears to measure what it is supposed to be measuring is referred to as:
When solving equations with square roots it is important to do which of the following?
-make sure the value of x is positive
-check the solution to ensure it is a rational number
-make sure the value of x is an integer
-check the solution to eliminate any extraneous solutions
Answer:make sure the value of x is positive
-check the solution to ensure it is a rational number
Step-by-step explanation: .
When solving equations with square roots it is important,
to make sure the value of x is positive.check the solution to ensure it is a rational numberEquation with square root:When solving equations with square roots it is important to keep in mind;
The value of x must be greater than or equal to zero i.e. value of x should be positive.
Rational number is a number which can be express in p/q form where q can not be equal to zero. Therefore, value of x should be rational number.
If radical expression is present, isolate the radical on one side of the equation. Square both sides of the equation. Solve the new equation.
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45 is 3/4 of what number?
Answer:
See below, please.
Step-by-step explanation:
\(45 \div ( \frac{3}{4} ) = 60\)
Hence, the number is 60.
Answer:
60
Step-by-step explanation:
¾ of X is 45
what is X!???
4/3×45 = 60Amelia can spend no more than $89 to rent a car for a day trip. A rental car costs $36 per day plus $0.20 per mile. Write and solve an inequality to find the possible distance in miles, m, that Amelia can drive without exceeding her budget.
Answer:
270 miles is your answer
Step-by-step explanation:
Click on the graph until the graph of a line with undefined slope appears.
Answer:
option 2
Step-by-step explanation:
The only kinds of lines with undefined slopes are vertical lines.
Answer:
The second graph.
Step-by-step explanation:
A vertical line has undefined slope so it is the second graph.
What is 1050 rounded to the nearest thousand?
Answer:
1100
Step-by-step explanation:
We round the number up to the nearest hundred if the last two digits in the number are 50 or above.
We round the number down to the nearest hundred if the last two digits in the number are 49 or below.
If the last two digits are 00, then we do not have to do any rounding, because it is already to the hundred.
find area of trapezoids
Answer
660in²
Step-by-step explanation:
B1=30
B2=36
h=20
1/2*20(30+36)
1/2*20(66)
10(66)
660in²
Write \(\frac{6^{2}}{\sqrt[3]{6} }\) as a single power of 6.
Step-by-step explanation:
\( \frac{6 {}^{2} }{ \sqrt[3]{6} } \)
\( \frac{6 {}^{2} }{6 {}^{ \frac{1}{3} } } \)
\(6 {}^{ \frac{5}{3} } \)
Pls help me ;-; I'm not very smart
Answer:
It is one to one function
hope this will help you ☺️☺️
f(x)=2/3x^3-3/2x^2+x+C
Step-by-step explanation:
thus it's B
(6th grade elementary)
Mrs Reyes loaned a money in the bank at 2.5% per annum (per year). If he loaned an amount of 80,000.00, how much will he pay the bank including the interest after a year?
after one year he will owe the bank 82,000.00
-2(-12)(-8) PLZ I NEED HELP WITH THIS ONE>
The values in the x column represent a specific number pattern, while the values in the y column represent a different pattern. Which graph provides visualization of these two patterns?
Answer: The answer is the top right question
Step-by-step explanation:
Answer:
the awnser is the top right one
Step-by-step explanation:
if you look at the x and y and look at the chart it says x 2 y 1 the first point is on x 2 and on y 1 and i did the test awnser was right
When 508,000,000 is written in scientific notation, what will be the value of the exponent?
Step-by-step explanation:
When 508,000,000 is written in scientific notation, it will be represented as:
5.08 x 10^8
Therefore, the value of the exponent is 8.
please help me on these 2
Ms. Ramos uses three and three-fourths tubes of blue paint and two and five-sixths tubes of red paint. How many tubes of paint does she use in all?
five and eight twenty-fourths tubes
five and seven-twelfths tubes
five and eight-tenths tubes
six and seven-twelfths tubes
Trevor buys four and three-eighths pounds of corn and three and seven-twelfths pounds of squash. How many pounds does he purchase in all?
seven and four-twelfths pounds
seven and ten-twentieths pounds
seven and twenty-three twenty-fourths pounds
eight and one twenty-fourth pounds
a. 5 and 7/12 tubes of paint (or 6 and 7/12 tubes if we want to convert to a mixed number) b. 8 and 7/24 pounds of food (or 7 and 19/24 pounds if we want to convert to a mixed number)
Describe Fraction?A fraction is a mathematical expression representing a part of a whole or a quantity that is not a whole number. It consists of two numbers, the numerator and the denominator, separated by a horizontal line or slash.
To find out how many tubes of paint Ramos used in all, we need to add the amount of blue paint and the amount of red paint.
Three and three-fourths tubes of blue paint can be written as 15/4 tubes of blue paint.
Two and five-sixths tubes of red paint can be written as 17/6 tubes of red paint.
To add these fractions, we need to find a common denominator. The least common multiple of 4 and 6 is 12, so we can convert the fractions as follows:
15/4 = 45/12
17/6 = 34/12
Now we can add the fractions:
45/12 + 34/12 = 79/12
This fraction can be simplified to a mixed number by dividing the numerator by the denominator:
79 ÷ 12 = 6 with a remainder of 7
So the answer is:
5 and 7/12 tubes of paint (or 6 and 7/12 tubes if we want to convert to a mixed number)
To find out how many pounds of corn and squash Trevor purchased in all, we need to add the weight of the corn and the weight of the squash.
Four and three-eighths pounds of corn can be written as 35/8 pounds of corn.
Three and seven-twelfths pounds of squash can be written as 47/12 pounds of squash.
To add these fractions, we need to find a common denominator. The least common multiple of 8 and 12 is 24, so we can convert the fractions as follows:
35/8 = 105/24
47/12 = 94/24
Now we can add the fractions:
105/24 + 94/24 = 199/24
This fraction can be simplified to a mixed number by dividing the numerator by the denominator:
199 ÷ 24 = 8 with a remainder of 7
So the answer is:
8 and 7/24 pounds of food (or 7 and 19/24 pounds if we want to convert to a mixed number)
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Which is odd one out? Explain how you know?
15,000 ones 1,500 tens 15 thousands 15,000 15 ten thousands
Given:
15,000 ones, 1,500 tens ,15 thousands, 15,000, 15 ten thousands.
To find:
The odd one out.
Solution:
First, we need to convert all the values in the standard form of a number.
\(15000\text{ ones}=15000\times 1\)
\(15000\text{ ones}=15000\)
Similarly,
\(1500\text{ tens}=1500\times 10\)
\(=15000\)
\(15\text{ thousands}=15\times 1000\)
\(=15000\)
\(15\text{ ten thousands}=15\times 10000\)
\(=150000\)
The standard form of all numbers is 15,000 except 15 ten thousands.
Therefore, the odd one out is 15 ten thousands.
Zari folds the net shown into a model of a solid figure. How many edges, faces, and vertices does the model have?
Answer:
-5 Faces
-10 Edges
-6 Vertices
Step-by-step explanation:
Folded out there are 3 rectangles and 2 triangles, 5 faces
Count the straight lines, no dotted, it's 10 edges
Count the corners only and the top of the triangles 6 vertices
The perimeter of a train ticket is 60 centimeters. It is 17 centimeters long. How tall is it?
If the perimeter of the train ticket is 60 centimeters and it's length is 17 centimeter long it's height is 13 centimeter
What is perimeter of a rectangle?A perimeter is a closed path that encompasses, surrounds, or outlines either a two dimensional shape or a one-dimensional length.
To find the perimeter of a rectangle we add all this sides together. This means that the perimeter of a rectangle is given as ;
P = l+l+w+w
P= 2(l+w)
60 = 2( 17+w)
60 = 2( 17+w)
17+w= 60/2
17+ w = 30
w = 30-17
w = 13cm
Therefore the height of the train ticket is 13cm
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A certain mammal has a life expectancy of about 17 years. Estimate the expected gestation period of this species.Is there any evidence that an animal's gestation period is related to the animal's lifespan? The scatterplot shows Gestation Period (in days) vs. Life Expectancy (in years) for 18 species of mammals. The highlighted point at the far right represents humans. Complete parts a through e. 600- Gestation (days) 300- 04 0 40 80 Life Expectancy (yr) e) A certain mammal has a life expectancy of about 17 years. Estimate the expected gestation period of this species. Dependent variable is: Gestation R-squared = 86.5% 600 Gestation (days) 300- Variable Coefficient Constant 90.1808 20 40 days 0+ 0 Life Expectancy (yr) (Do not round until the final answer. Then round to one decimal place as needed.)
The expected gestation period of this species with a 17-year life expectancy is approximately 430.2 days, rounded to one decimal place as needed.
A certain mammal has a life expectancy of about 17 years. To estimate the expected gestation period of this species, we can use the scatterplot provided, which shows Gestation Period (in days) vs. Life Expectancy (in years) for 18 species of mammals.
To determine if there is any evidence that an animal's gestation period is related to the animal's lifespan, we can look at the R-squared value provided, which is 86.5%. This indicates a strong positive correlation between gestation period and life expectancy.
To estimate the gestation period for the species with a 17-year life expectancy, we can use the provided linear regression equation:
Gestation = Constant + Coefficient * Life Expectancy
The given constant is 90.1808 and the coefficient is 20.
Gestation = 90.1808 + (20 * 17)
Gestation = 90.1808 + 340
Gestation ≈ 430.2 days
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If a dtc has not been set, then the vehicle is running perfectly
If a DTC has not been set, it does not necessarily mean that the vehicle is running perfectly. It simply means that the computer system has not detected a problem that would trigger the code. There could still be issues with the vehicle that are not being reported by the system.
A DTC, or Diagnostic Trouble Code, is a code that is stored in a vehicle's onboard computer system when a problem is detected. The code indicates that there is an issue with a specific component or system in the vehicle. The presence of a DTC usually triggers a warning light on the dashboard or some other type of alert to the driver.
It is important to note that a vehicle's computer system can only detect issues that it is designed to monitor. There may be other problems with the vehicle that are not related to the systems being monitored, such as problems with the suspension, steering, or brakes. These issues would not be detected by the computer system, and could cause problems while driving.
In conclusion, while the absence of a DTC is a good sign, it does not necessarily mean that the vehicle is running perfectly. It is important to perform regular maintenance and inspections to ensure that all systems are functioning properly, regardless of whether or not a DTC has been set.
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The formula for the volume of a right circular cylinder is v=pi×r²×h. If r=4b and h=2b+4, what is the volume of the cylinder in terms of b
The volume of the cylinder in terms of b is 32πb³ + 64πb².
To find the volume of the cylinder in terms of b, we need to substitute the given values of r and h into the formula:
V = π × r² × h
V = π × (4b)² × (2b+4)
V = π × 16b² × (2b+4)
V = 32πb³ + 64πb²
Therefore, the volume of the cylinder in terms of b is 32πb³ + 64πb².
In mathematics, volume is a measure of the amount of space occupied by a three-dimensional object. It is usually expressed in cubic units such as cubic meters, cubic feet, or cubic centimeters.
The volume of some regular three-dimensional shapes can be calculated using specific formulas. For example, the volume of a rectangular prism can be found by multiplying its length, width, and height. The volume of a cylinder can be found by multiplying the area of its base (usually a circle) by its height. The volume of a sphere can be found by using the formula (4/3)πr^3, where r is the radius of the sphere.
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