A guidance counselor wants to determine if there is a relationship between a student’s number of absences, x, and their grade point average (gpa), y. the given data list the number of absences and gpas for 15 randomly selected students. using technology, what is the value of r2? a. –0.56
b. –0.32
c. 0. 32
d. 0.56

Answers

Answer 1

Linear regression is used to model the linear relationship between two variables and r2 measures the strength of this relationship. It is calculated by squaring the correlation coefficient, which is a measure of the strength and direction of the relationship.

To determine the value of r2, you can use technology to perform a linear regression analysis on the given data. Linear regression is a statistical method used to model the linear relationship between two variables, x and y. The value of r2, also known as the coefficient of determination, measures the strength of the relationship between x and y and indicates how well the model fits the data.

The value of r2 is calculated using the following formula:

r2 = (Correlation coefficient)2

The correlation coefficient, also known as the Pearson correlation coefficient, is a measure of the strength and direction of the relationship between two variables. It is calculated using the following formula:

r = ∑(x - x')(y - y') / √[∑(x - x')2 ∑(y - y')2]

where x' and y' are the means of the x and y variables, respectively, and ∑ indicates the sum of the values.

To determine the value of r2, you would first need to calculate the correlation coefficient using the given data. Once you have calculated the correlation coefficient, you can then square it to get the value of r2.

To learn more about Linear regression, visit:

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#SPJ4

Answer 2

You can use technology to do a linear regression analysis on the supplied data to find the value of r2. A statistical technique called linear regression is used to simulate the linear relationship between two variables, x and y. The strength of the link between x and y is measured by the coefficient of determination, or r2, which also serves as a measure of how well the model fits the data.

The value of r2 is calculated using the following formula:

r2 = (Correlation coefficient)2

The correlation coefficient, also known as the Pearson correlation coefficient, is a measure of the strength and direction of the relationship between two variables. It is calculated using the following formula:

r = ∑(x - x')(y - y') / √[∑(x - x')2 ∑(y - y')2]

where x' and y' are the means of the x and y variables, respectively, and ∑ indicates the sum of the values.

You must first compute the correlation coefficient using the provided data in order to obtain the value of r2. Once the correlation coefficient has been determined, you can square it to obtain the value of r2.


Related Questions

Reggie deposited $1200 into an account that earns 5% compound interest yearly if he does not deposit any more to the account or take any money out of the account how much interest will Reggie earn on his investment at the end of four years round your answer to the nearest whole number

Answers

Answer:

$1,440

Step-by-step explanation:

1,200 / 10 = 120. 120 is 10%. So this means that 5% is $60. 60 x 4 = 240.

1,200 + 240 = 1,440

The following information is given about a trapezoid: A trapezoid is isosceles if its non-parallel sides are congruent. Trapezoid ABCD is not isosceles. Based
on the information, which statement is a valid conclusion about Trapezoid ABCD?

-The parallel bases are congruent.
-The non-parallel sides are perpendicular,
-The non-parallel sides are not congruent.
-One base and one non-parallel side are perpendicular.

Answers

I have no idea tbh but just look it up

Henry cut a 58 inch plank of wood into two pieces. The longer piece is 20 inches longer than the
shorter piece. What are the lengths of both pieces?

Answers

Yes yes I’m so pretty good I’m sorry I’m not gonna be able to get it back on my bed phone I’m

what are the ordered pairs of the solutions for this system of equations? f(x)=x2-2x+3; f(x)=-2x+28

Answers

Answer: (5,18); (-5,38)

Step-by-step explanation:

x^2-2x+3=-2x+28

x^2-25=0

(x-5)(x+5)= 0

-2(5)+28= 18

-2(-5)+28=38

(5,18)(-5,38)

This is due in 2 minutes

Answers

Stop with the links don’t work

should I be worried about my upcoming exams?​

Answers

Of course! Just study hard, exams are a big part of your grade most of the time! I also have exams

Answer:

i don't know but I am I have them Monday I'm pretty sure I will fail in math but you'll be good

Step-by-step explanation:

brainlyest please I'm trying to get my thing up

What is the measure of each angle?? NEED HELP ASAP

Answers

Answer:

The base angles are 64. The top angle is 52

Step-by-step explanation:

Since this is an icoseles triangle, the base angles are equal so:

8x - 16 = 6x + 4

8x - 6x = 4 + 16

2x = 20

x = 10

8x - 16

8(10) - 16

80 - 16

64

The top angle (x)

x + 64 + 64 = 180

x + 128 = 180

x = 52

Ashik claims that the graph on the right is the correct interpretation of the scatterplot, but his friend Shelby claims that the graph on the left is correct.

Shelby’s Graph Ashik’s Graph
A graph titled Shelby's Graph has points that form a curved line. A line with negative slope is drawn. A graph titled Ashik's Graph has points that form a curved line. A curved line is drawn to connect the points.

Who is correct and why?
Shelby is correct because the line of best fit has a negative slope and the trend shows a decrease in y values as the x values increase.
Shelby is correct because the line of best fit matches the points as closely as possible with a weak correlation.
Ashik is correct because the points are a strong correlation to this nonlinear association.
Ashik is correct because points with a weak correlation can never have linear association.

Answers

Answer:

It’s B

Step-by-step explanation:

Answer:

The correct answer is C

Step-by-step explanation:

just took the test and got a 100.... btw i kinda need Brainliest to move to the next level can u help?

Edge 2021

Slope- intercept equation from a graph

Find the equation of the line

Answers

We can find the slope using any two points on the line. Readily identifiable are the points (2, 0) and (0, 3), from which we can find the slope:

[tex]\text{slope} = m=\frac{y_2-y_1}{x_2-x_1} \\ m = \frac{3-0}{0-2} = -\frac{3}{2}.[/tex]

The y-intercept is the y value when x = 0, which we already know is 3. So, the slope-intercept equation of this line is:

[tex]y=-\frac{3}{2}x+3.[/tex]

what is the awnser to 848 ÷ 6 =

Answers

Answer:

I think 141 is the answer

Find the equation of the graphed line.

Answers

Answer:

d. y = -⁷/6x - 7

Step-by-step explanation:

✔️First, find the slope (m) using two points on the line, (-6, 0) and (0, -7):

Slope (m) = change in y/change in x

Slope (m) = (-7 - 0)/(0 - (-6))

Slope (m) = -7/6

✔️Determine the y-intercept (b):

The line intercepts the y-axis at -7. Therefore,

b = -7.

✅To write the equation, substitute m = -⁷/6 and b = -7 into y = mx + b

Thus:

y = -⁷/6x + (-7)

y = -⁷/6x - 7

GIVING BRAINLIEST!!!!!!!!

1/2 x(6X4)+3+2

SHOW UR WORK PLS

Answers

Answer: 1/2 times 6x equals 3x  and then you do 1/2 times 4 and that equals 2 then multiply the 3 and 4 in the parenthesis and that is 12 then add 12 to the 3 and 2 and your answer is 17.

Step-by-step explanation:

Circle O has a circumference of approximately 250π ft. Circle O with diameter d is shown. What is the approximate length of the diameter, d? 40 ft

Answers

Answer:

250 ft

Step-by-step explanation:

circumference of a circle = πD

D = diameter

to find diameter divide by pi

d = 250

5. Determine the horizontal distance when the vertical distance is 2m. You must
solve algebraically, not just use your graph to predict.

Really need help with this. Thanks. :)

Answers

Answer:

5

Step-by-step explanation:

Please help me!!!!!!

Answers

Answer:

13.5 ft²

Step-by-step explanation:

This is also a trapezoid so we can do this formula:

[tex]A=\frac{a+b}{2} *h\\\\A=\frac{3+6}{2} *3\\\\A=\frac{9}{2} *3\\\\A=4.5*3\\A=13.5[/tex]

Determine the measure of angle b.

Answers

Answer:

37

Step-by-step explanation:

Because 180 is a straight line.

Subtract 143 from 180 amd get 37.

Hope this helps ^-^

What is the scale factor and x value?

Answers

don’t click on the li

How many bases are there in the triangular pyramid shown below?

Answers

Answer:

1

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

In a pyramid, there is only one base that touches the ground.

However, in a prism, there are two bases, two of the same ends.

The front of the name of the shape also hints:

If it's an octagonal prism, there are two octagon bases.

If it's a hexagonal pyramid, there is one hexagon base.

What is the value of y?

Answers

Answer:

3y+3+y+2y=  

3y+y+2y+3=

4y+2y=6y/3=

3y

Step-by-step explanation:

Please help with this math equation

Answers

Answer: 1725 ft^2

Step-by-step explanation:

Rectangle part is 30*50 or l*w = 1500

Triangle is 15*30/2=225

Add the two to get area

1500+225=1725

Find x, to the nearest hundredth.​

Answers

Answer:

Step-by-step explanation:

cos 44° = [tex]\frac{x}{14}[/tex]

x = 14 × cos 44°

x ≈ 10.07 units

Dora wants to paint the walls, ceiling and floor of her playhouse. The dimensions of the playhouse are 3 m long by 4 m wide by 5 m high. What is the total area that she must paint?

Answers

Answer:

Dora has to paint a total ol 60m

Step-by-step explanation:

4x5x3

4x5= 20

20x3=60

An aquarium holds 11.04 cubic feet of water, and is 2.3 feet long and 1.2 feet wide. What is its depth? Round your answer to the nearest whole number. The depth is feet.

Answers

Answer:

Depth is 4 feet.

Step-by-step explanation:

Given:

Length of an aquarium is 2.3 feet

Width of an aquarium is 1.2 feet

Volume of an an aquarium is 11.04 cubic feet

To find: depth of an aquarium is 2.3 feet

Solution:

If [tex]l,b,h[/tex] denote length, width and height of a cuboid then volume (V) of a cuboid is equal to [tex]lbh[/tex]

[tex]l=2.3[/tex] feet

[tex]b=1.2[/tex] feet

[tex]V=11.04[/tex] cubic feet

[tex]11.04=2.3(1.2)h\\h=\frac{11.04}{2.3(1.2)}\\h=\frac{11.04}{2.76}[/tex]

[tex]h=4[/tex] feet

Therefore,

depth is 4 feet.

Which is the graph of linear inequality 6x + 2y > –10? NO PICTURES PLZZ

Answers

Answer:

y>-5-3x

Step-by-step explanation:

Please help!! I completely forgot how to do this and please show your work

Answers

Answer:

12c-30

Step-by-step explanation:

6(2c-5)

12c-30

..........

Answer:

6(2c-5)

multiple the 6 on both numbers

12c-30

An arithmetic sequence has a first term of 0 and the 9th term of 12. If 27 is an output of the sequence, which term number is it? Show all steps of calculations and explain in a sentence at the end how you know you have the correct term number.

Giving 100 points to first correct answer

Answers

Answer:

Step-by-step explanation:

[tex]a_{n}=a_{1}+(n-1) d\\n=9\\12=0+(9-1)d\\8d=12\\d=\frac{12}{8}=\frac{3}{2}\\again\\27=0+(n-1)*\frac{3}{2}\\n-1=27*\frac{2}{3}=18\\n=18+1=19[/tex]

Evaluate 3 (43+ 2) - 6 + 12 ➗ 4 x 2

Answers

Answer:

Hi! The answer to your question is Exact form: [tex]\frac{141}{8}[/tex], Decimal form: 17.625, Mixed number form: 17 5/8

Step-by-step explanation:

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☆Brainliest is greatly appreciated!☆

Hope this helps!!

- Brooklynn Deka

For every 3 packages that Marcella wraps, she uses 12 of a roll of wrapping paper. If she uses 212 rolls of wrapping paper, how many packages has she wrapped?

Answers

Answer:

She wrapped 27 packages also can i have brain or heart

Find the constant proportionality (r) using the value for r, enter an equation in the form of. C=rg that represents the relationship between the number of the gallons of gasoline used (g) and the total cost(c)

Answers

Answer:

3.333

C = 3.3333g

Step-by-step explanation:

Given the relation : C = rg

C = Total cost of gasoline

g = Number of gallons of gasoline used

r = constant of proportionality

Picking any point on the graph :

At cost, c = $30

Number of gallons of gasoline used, g = 9

Putting the values into our equation :

C = rg

$30 = r * 9

30 = 9r

Divide both sides by 9

30/9 = 9r / 9

3.333 = r

Hence, constant of proportionality, r = 3.333

find the slope of each line
helppp!!

Answers

Answer:

-3/4

Step-by-step explanation:

The slope is -3/4

The line goes down three and four left.  

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