What is the effect on Rand SSR if the coefficient of the added regressor is exactly 0? O A I the coefficient of the added regressor is exactly 0, both the R and SSR increase 3. the coefficient of the added regressor is exactly the R and SSR both do not change O C. If the coefficient of the added regressor is exactly the Rf increases and the SSR decreases O D. If the coefficient of the added regressor is exactly the decreases and the SSR increases

Answers

Answer 1

The correct option is (C). If the coefficient of the added regressor is exactly 0, the Rf increases and the SSR decreases.Rf is the F-statistic, which tests if there is a statistically significant relationship between the dependent and independent variables.

SSR is the sum of squared residuals, which measures the differences between the actual and predicted values of the dependent variable.When an additional variable is added to a regression model, the R-squared value (R²) increases, indicating that the new variable explains some of the variation in the dependent variable. The F-statistic, which tests the null hypothesis that all the coefficients of the independent variables are zero, also increases because of the additional variable.The coefficient of determination (R²) increases when the added variable is statistically significant. When a non-significant variable is included in a regression model, the R² does not change, but the F-statistic decreases.

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Related Questions

David saves $25.78 to buy a video game. After he buys the video game, he has $3.04 left over. How much does David spend on the video game?

Answers

Answer:

He spent 22.74

Step-by-step explanation:

because 25.78−22.74 = 3.04

please help
For a standard normal distribution, find: \[ P(z>c)=0.813 \] Find $ c $ rounded to two decimal places.

Answers

The value of c, rounded to two decimal places, is approximately 0.88.

To find the value of c in a standard normal distribution such that P(z > c) = 0.813, we need to determine the z-score corresponding to the given probability.

Using a standard normal distribution table or a calculator, we can find that the z-score associated with a probability of 0.813 is approximately 0.88.

Therefore, c is the value in the distribution such that P(z > c) = 0.813, and when rounded to two decimal places, c ≈ 0.88.

In a standard normal distribution, the z-score represents the number of standard deviations away from the mean. The given probability of 0.813 indicates that the area under the curve to the right of c is 0.813, which means that approximately 81.3% of the data lies to the left of c. By finding the corresponding z-score, we can determine the specific value of c that satisfies this probability condition.

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Four runners are training for long races. Noah ran 5.123 miles, Andre ran 6.34 miles, Jada ran 7.1 miles, and Diego ran 8 miles.

Answers

Answer:

Is this an incomplete question?

Answer:

this isnt a question???

Step-by-step explanation:

Person who gets it correct wins brainliest! This is due is 2 minutes! Question is in the screenshot. QUESTION 2!

Answers

Answer:

Step-by-step explanation:

Cubic centimeters is multiplying by another dimension which means volume. Squared centimeters means area.

why are marcelâ€™s and stephanieâ€™s taxable incomes less than their annual salaries?

Answers

The taxable income of Marcel and Stephanie is less than their annual salary because they are allowed to make deductions from their income before calculating their taxable income.

These deductions include contributions to retirement plans, health insurance premiums, and other eligible expenses. The amount of deductions varies depending on factors such as the type of expense and the individual's tax filing status.

Thus, the taxable income is the amount of income that is subject to taxation, and it is generally lower than the individual's annual salary. In the case of Marcel and Stephanie, their taxable incomes are calculated by subtracting their deductions from their respective annual salaries.

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Complete Question:

Why are Marcel's and Stephanie's taxable incomes less than their annual salary? Marcel's annual salary is $30,000 and his income is $17,450. Stephanie's annual salary is $50,000 and her income is $37,600.

for a summer bbq you have 30 friends coming over. how many picnic tables do you need if you can seat 4 people at each picnic table?

Answers

Answer:

You need 8 picnic tables.

Step-by-step explanation:

You need 8 picnic tables because there are 30 friends and 4 sits at each table, and 4 x 8 is 32. There is 2 more extra seats. But it does fit all 30 friends.

How do you multiply polynomials step by step?

Answers

A polynomial is a mathematical expression consisting of variables, coefficients, and exponents, we can be multiply two polynomials step by step.

Distribute each term of the first polynomial to every term of the second polynomial.

Combine like terms by adding the coefficients of the terms that have the same variables raised to the same powers.

Simplify the result by arranging the terms in descending order of the exponent of the variable.

For example, let's say you want to multiply (2x + 3) and (x - 4):

(2x + 3) * (x - 4) = 2x * x - 2x * 4 + 3 * x - 3 * 4

Simplify the terms: 2x^2 - 8x + 3x - 12

Combine like terms: 2x^2 - 5x - 12

Therefore, the product of (2x + 3) and (x - 4) is 2x^2 - 5x - 12.

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Consider the original triangle and the enlargement,
2 cm
8 cm
3 cm

Answers

Answer: 12

Explaining: 2 times 4 is 8 so makes it reasonable to say 3 times 4 is 12. Also both of the triangles are similar just the left is smaller and the right is larger.

The circumference () C of a circle is 18 18 centimeters. Which formula can you use to find the radius () r if you know that =2π C = 2 π r ? CLEAR CHECK =2π r = C 2 π =2π r = 2 C π =π2 r = π C 2 =2π

Answers

The formula to find the radius (r) of a circle when you know the circumference (C) is r = C/(2π).

The formula presented derived from the formula for the circumference of a circle, which is C = 2πr. By rearranging the equation and isolating the radius (r) on one side, we get r = C/(2π).

So, if the circumference (C) of a circle is 18 centimeters, you can use the formula r = C/(2π) to find the radius (r). Plugging in the given value for the circumference (C), we get:

r = 18/(2π)

Simplifying the equation gives:

r = 9/π

Therefore, the radius (r) of the circle is 9/π centimeters.

In conclusion, the formula you can use to find the radius (r) of a circle when you know the circumference (C) is r = C/(2π).

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Match each expression with its value. −9 7 −2 Undefined h( 3.999 ) h(4) h(4.0001) h(9)

Answers

The values are: -9, 7, -2, Undefined, Undefined, 8, Undefined, Undefined.

Let's match each expression with its corresponding value:

Expression: -9

Value: -9

Expression: 7

Value: 7

Expression: -2

Value: -2

Expression: Undefined

Value: Undefined

Expression: h(3.999)

Value: Undefined

Expression: h(4)

Value: 8

Expression: h(4.0001)

Value: Undefined

Expression: h(9)

Value: Undefined

Now let's explain the reasoning behind each value:

The expression -9 represents the number -9, so its value is -9.

Similarly, the expression 7 represents the number 7, so its value is 7.

The expression -2 represents the number -2, so its value is -2.

When an expression is labeled as "Undefined," it means that there is no specific value assigned or that it does not have a defined value.

For the expression h(3.999), its value is undefined because the function h(x) is not defined for the input 3.999.

The expression h(4) has a value of 8, indicating that when we input 4 into the function h(x), it returns 8.

Similarly, the expression h(4.0001) has an undefined value because the function h(x) is not defined for the input 4.0001.

Lastly, the expression h(9) also has an undefined value because the function h(x) is not defined for the input 9.

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How many trees can be planted at a distance of 6m each around a rectangular
r polt whose length is 120m and breath is 90cm

Answers

70 trees can be planted at a distance of 6 meters each around the rectangular plot.

In order to find the number of trees, we must first find out how much space we have in the plot. To find the space, calculate the perimeter of rectangular plot. Formula of perimeter of rectangular plot: 2 (length + breadth)

Perimeter of Rectangular plot : 2 (120m + 90m)

= 420m

Therefore, the perimeter of the rectangular plot in 420m, To determine how many trees can be planted, we need to divide the perimeter by the distance between each tree: Number of trees = Perimeter / Distance between trees.

= 420m / 6m

= 70

Therefore, 70 trees can be planted around the rectangular plot at a spacing of 6 meters apart.

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Complete Question

How many trees can be planted at a distance of 6m each around a rectangular plot whose length is 120m and breadth is 90m?

Anybody know how to do # 14, 15, and 16? Would also be nice if yall told me if any of these were wrong

Answers

Step-by-step explanation:

1. Right

2. Right

3. Right

4. Right

5. Right

6. Right

7. Its not properly visible sorry for this.

8. Its wrong

$ (\frac{1}{3} ) {}^{2} = \frac{1}{9} $

9. Right

10. Its wrong

$0.5 {}^{3} = 0.125$

11. Right

12. Its wrong.... Bcz square of minus is plus

$ - 9 {}^{2} = 81$

13. Right

14. According to the BODMAS rule..

$15 - 7 \times 2 + {2}^{3} $

$15 - 14 + 8$

$1 + 8 = 9$

15.

$(11 - 8) {}^{2} - 2 \times 6$

$3 {}^{2} - 12$

$9 - 12 = - 3$

16.

$12 + \frac{ {9}^{2} }{3} $

$12 + \frac{81}{3} $

$12 + 27 = 39$

Hope this helps u

... ✌️❤️

I don't understand this question can someone help me with this please, please explain!! and thank you for the help

Answers

Answer:

The 3rd option

Step-by-step explanation:

Look at the data provided:

12, 17, 18, 20, 16, 10, 13, 21, 9, 10, 22

In a box-and-whisker plot, draw a box from the first quartile to the third quartile:

Q1 = 11

Q3 = 19

A vertical line goes through the box at the median:

Median (Q2): 15

The whiskers go from each quartile to the minimum or maximum:

Minimum: 9

Maximum: 22

Hope this helped :)

Consider f(x)=x(x^3+1)+6x^2-8xDescribe the end behavior include how you got your awnser

Answers

To find the end behavior of the function:

$f(x)=x(x^3+1)+6x^2-8x$

We look at the graph of it:

And look at what happens when the x is to small and to big.

• When x goes to infinity the function goes to infinity.

• When x goes to minus infinity the function goes to infinity.

The other way to find this is taking the limits to infinity in each end:

$\lim _{x\to\infty}f(x)=\infty$$\lim _{x\to-\infty}f(x)=-\infty$

Consider f(x)=x(x^3+1)+6x^2-8xDescribe the end behavior include how you got your awnser

There are 4 tablespoons in 1/4 cup. There are 2 cups in 1 pint. How many tablespoons are there in 1 pint?

Answers

Answer:

i think the answer is 32

Answer:

32 tablespoons

Step-by-step explanation:

let β = {x1, . . . , xk} be an orthonormal basis for the subspace W of R^n. use the matrix x ∈ Mn×k(R) with columns x1, . . . , xk, to construct p ∈ Mn×n(R) such that Lp is the orthogonal projection on W. Justify your answer rigorously, i.e., show that Lp is indeed an orthogonal projection with R(Lp) = W.

Answers

To construct the matrix P that represents the orthogonal projection onto the subspace W spanned by the orthonormal basis β = {x1, ..., xk} in R^n, we can use the formula:

P = X (X^T X)^(-1) X^T

Here, X is the matrix with columns x1, ..., xk. The matrix P will have dimensions n x n.

To justify that Lp is the orthogonal projection with R(Lp) = W, we need to show two properties:

Lp is an orthogonal projection:

Lp is idempotent: (Lp)^2 = Lp

Lp is self-adjoint: (Lp)^T = Lp

R(Lp) = W:

Every vector in the range of Lp is in W

Every vector in W is in the range of Lp

Let's break down the steps to construct P and verify these properties:

Step 1: Compute the matrix X^T X

X^T is the transpose of X

Multiply X^T with X to obtain X^T X

Step 2: Invert the matrix (X^T X)^(-1)

If X^T X is invertible, calculate its inverse (if it is not invertible, the orthogonal projection does not exist)

Step 3: Compute the matrix P = X (X^T X)^(-1) X^T

Multiply X by (X^T X)^(-1)

Multiply the result by X^T

Step 4: Verify the properties of Lp

Check if (Lp)^2 = Lp

Check if (Lp)^T = Lp

Step 5: Verify R(Lp) = W

Check if every vector in W is in the range of Lp

Check if every vector in the range of Lp is in W

By following these steps and verifying the properties, we can rigorously show that Lp is indeed an orthogonal projection with R(Lp) = W.

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neil uses 41-cent stamps and 8-cent stamps to mail a gift card to a friend. if the postage is $1.95, how many of each stamp did neil use?

Answers

If Neil uses 41-cent stamps and 6-cent stamps to mail a gift card to a friend , then the number of 41 cent stamp used is 3 and number of 6 cent stamps used is 12 .

Let number of 41 cents stamps used be = x ;

and let number of 6 cents stamps used be = y ;

converting amount 41-cents in dollars is = $0.41 ;

and converting amount 6-cents in dollars is = $0.06 ;

the amount for which Neil used 41-cent stamps , 6-cent stamps is = $1.95 ;

this situation in equation form is written as ⇒ 0.41x + 0.06y = 1.95

Multiplying on both sides by 100 , we get

⇒ 41x + 6y = 195 ;

⇒ y = (195 - 41x)/6 ;

We will test this equations for values of x and y , the number of stamps must be whole numbers .

If x = 1 , then value of y is = 25.66

If x = 2 , then value of y is = 18.833

If x = 3 , then value of y is = 12

If x = 4 , then value of y is = 5.166 .

the only value of x and y which shows a whole number as an output is : If x = 3 , then y = 12 .

Therefore , Neil used "3" 41-cents stamps and "12" 6-cent stamps .

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The population of Colorado in 2009 was about 5,024,748. The land area can be approximated by a rectangle with coordinates (0, 0), (369, 0), (369, 281), and (0, 281), with each unit on the coordinate plane being 1 mile. What was the population density of Colorado in 2009?

Answers

Answer:

The approximate area of Colorado is

369 × 281 = 103,689 square miles

So the population density of Colorado in 2009 was

5,024,748 people / 103,689 square miles = about 48.46 people per square mile

(about 48 people per square mile)

PLEASE HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPP meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

A repair technician replaces cracked screens on phones. He can replace 5 screens in 3 hours. ( Let s represent the screens and h represent the time)

1. Write an equation you can use to represent the above situation.

2. Use your equations to determine how long it would take to replace 34 screens.

Answers

Answer: 1. s*h 2. 20.4 hours

Step-by-step explanation: 1. s*h

2. 20.4 hours hope this helps.

20 A cinema records the ratio of children to adults in the audiences of two films shown
week.
Film A
Film B
Film A
children: adults
Tick (✓) the film that has the greater proportion of children in the audience.
Show how you worked out your answer.
11:19
5:7
Film B

Answers

Answer:

To compare the proportion of children in the audience for both films, we can calculate the percentage of children in each audience.

For Film A, the ratio of children to adults is 11:19, which means that the total number of parts is 11 + 19 = 30.

The percentage of children in Film A audience is:

(11/30) x 100% = 36.67%

For Film B, the ratio of children to adults is 5:7, which means that the total number of parts is 5 + 7 = 12.

The percentage of children in Film B audience is:

(5/12) x 100% = 41.67%

Since the percentage of children in Film B audience is greater than that of Film A, we can conclude that Film B has a greater proportion of children in the audience. Therefore, the answer is Film B.

how can you describe performance relative to the whole class?

Answers

Performance relative to the whole class refers to an individual's academic achievement in comparison to the rest of their peers in a particular subject or course.

We describe performance relative to the whole class.

To do this, we'll be using the terms "average", "percentile rank", and "standard deviation".
Average:

Calculate the average performance of the whole class by adding all students' scores and then dividing by the number of students.

This will give you a baseline to compare individual performances against the class average.
Percentile Rank:

Determine the percentile rank of a student by calculating the percentage of students in the class who scored lower than them.

For example, if a student is in the 75th percentile, it means they performed better than 75% of the class.
Standard Deviation:

Calculate the standard deviation, which measures the spread of scores within the class.

A low standard deviation indicates that most students have similar performances, while a high standard deviation shows more variability in scores.
By considering these three factors, you can effectively describe a student's performance relative to the whole class. For example, you might say: "John scored above the class average, placing him in the 80th percentile with a moderate standard deviation, indicating that his performance is better than the majority of his classmates."

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Find the distance between the pair of points given on the graph

Answers

The right answer is √74 units.

Please see the attached picture for full solution

Hope it helps

Good luck on your assignment

Dr. sanchez has prescribed a patient 750mg of a drug to be taken in an oral solution twice a day. in stock you have 2.5% solution to dispense. what amount of the available solution will each dose be?

Answers

According to the given statement Each dose will require 15mL of the available solution.

To calculate the amount of the available solution for each dose, we can use the following steps:
Step 1: Convert the drug dosage from mg to grams.
750mg = 0.75g

Step 2: Calculate the total amount of solution needed per dose.
Since the drug is prescribed to be taken in an oral solution twice a day, we need to divide the total drug dosage by 2..
0.75g / 2 = 0.375g

Step 3: Calculate the volume of the available solution required.
We know that the available solution is 2.5% solution. This means that for every 100mL of solution, we have 2.5g of the drug.
To find the volume of the available solution required, we can use the following equation:
(0.375g / 2.5g) x 100mL = 15mL
Therefore, each dose will require 15mL of the available solution.

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Each dose will require 15000 mL of the available 2.5% solution.

To determine the amount of the available solution needed for each dose, we can follow these steps:

1. Calculate the amount of the drug needed for each dose:

The prescribed dose is 750mg.

The patient will take the drug twice a day.

So, each dose will be 750mg / 2 = 375mg.

2. Determine the volume of the solution needed for each dose:

The concentration of the solution is 2.5%.

This means that 2.5% of the solution is the drug, and the remaining 97.5% is the solvent.

We can set up a proportion: 2.5/100 = 375/x (where x is the volume of the solution in mL).

Cross-multiplying, we get 2.5x = 37500.

Solving for x, we find that x = 37500 / 2.5 = 15000 mL.

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Jeff is decorating papers with the child he is babysitting. They have a total of 7 heart stickers and 14 star stickers to use. If they want to make all the papers identical with the same combination of heart and star stickers and no stickers left over what is the greatest number of pages they can decorate

Answers

Answer:

Step-by-step explanation:

Given the following :

7 heart stickers and 14 star stickers :

The greatest number of pages that can be decorated using the stickers above without any left over ;

To get this we obtain the greatest common factor of 7 and 14

Factors of 14

14 : 1, 2, 7, 14

Factors of 7

7 : 1, 7

The greatest factor common in both numbers is 7

Hence, greatest number of pages that can be decorated without any leftover is 7

a cylindrical pipe is 36 ft long and has a volume of 100ft. find its approximate diameter to the nearest hundredth of a foot

Answers

Answer:

0.940

Step-by-step explanation:

100 = 36 x pi x r^2

now divide both sides by 36pi

r^2 = 0.88419412...

then square root both sides

r = 0.94031597...

A(n) method is like a blueprint, or template, for all the objects within a class. true or false?

Answers

The statement " A(n) method is like a blueprint, or template, for all the objects within a class" is true because methods define the behavior or operations that an object can perform and are defined within a class, acting as a blueprint or template for creating objects in object-oriented programming.

A method in object-oriented programming is a set of instructions that defines the behavior or operations that an object can perform. It is a part of a class, which acts as a blueprint or template for creating objects. When an object is created from a class, it can access and use the methods defined within that class.

Methods can be used to perform tasks, manipulate data, or interact with other objects. They are an essential aspect of encapsulation in object-oriented programming, as they allow for data to be accessed and manipulated in a controlled manner. Overall, methods are a crucial tool for developers to create robust and scalable applications.

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complete the sentences by dragging the correct term or group of terms into the blanks. not all terms will be used.

Answers

The complete question is :

How do uv-induced dna lesions lead to mutation? drag the terms on the left to the appropriate blanks on the right to complete the sentences. not all terms will be used.

Answer:

When cells enter S phase with Ultraviolet-induced DNA lesions, the replicative DNA polymerases stall at the lesion.

Step-by-step explanation:

How does UV light cause mutation in DNA?

As a result of photosensitization, which causes the production of a free radical that interacts with DNA and oxidizes its bases, ultraviolet radiation causes oxygen-dependent DNA damage. Mutations occur when these oxidized bases don't pair properly during the replication process. The various types of DNA damage caused by ultraviolet radiation result in particular types of mutations and the development of skin cancer in people, frequently decades after initial exposure. There are noticeable UV-induced DNA lesions that are caused by various UV wavelengths.

When cells enter S phase with Ultraviolet-induced DNA lesions, the replicative DNA polymerases stall at the lesion.

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a pile of sand removed from destin harbor is a cone measuring 6 feet high and 30 feet across the base.How many trips it will take to haul away the sand using a dump truck with a capacity of 9 cubic yards?