Find the equation of the regression line for the given given x-values, if meaningful. The number of hours E Hours spent studying, x Test score, y 39 Find the regression equation.
Find the equation of the regression line for the given given x-values, if meaningful. The number of hours E Hours spent studying, x Test score, y 39 Find the regression equation.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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How to solve this problem
Transcribed Image Text:Testscore
Testscore
Testscore
Testscore
O
Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line. (The pair of variables have a significant correlation.) Then use the regression equation to predict the value of y for each of the
given x-values, if meaningful. The number of hours 6 students spent for a test and their scores on that test are shown below.
Hours spent studying, x
Test score, y
3
4
4
(a) x = 3 hours
(c) x= 15 hours
6.
(b) x= 4.5 hours
(d) x 1.5 hours
39
43
50
48
65
73
.....
Find the regression equation.
y=x+ (D
(Round the slope to three decimal places as needed. Round the y-intercept to two decimal places as needed.)
Choose the correct graph below.
O A.
O B.
C.
O D.
80-
80-
80-
80-
0-
0-
0.
0-
8
8
8.
Hours studying
Hours studying
Hours studying
Hours studying
(a) Predict the value of y for x= 3. Choose the correct answer below.
O A. 50.7
O B. 61.0
O C. 40.4
O D. not meaningful
(b) Predict the value of y for x=4.5. Choose the correct answer below.
O A. 40.4
O B. 132.9
O C. 61.0
O D. not meaningful
(c) Predict the value of y for x=15. Choose the correct answer below.
O A. 132.9
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(99+
Transcribed Image Text:.....
Hours studying
Hours studying
Hours studying
Hours studying
(a) Predict the value of y for x=3. Choose the correct answer below.
O A. 50.7
O B. 61.0
OC. 40.4
O D. not meaningful
(b) Predict the value of y for x=4.5. Choose the correct answer below.
O A. 404
O B. 132.9
OC. 61.0
OD. not meaningful
(c) Predict the value of y forx 15. Choose the correct answer below.
OA. 132.9
OB. 50.7
OC. 61.0
O D. not meaningful
(d) Predict the value of y forx 15. Choose the correct answer below.
O A. 132.9
B. 50.7
OC. 40.4
O D. not meaningful
Next
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73°F Clear
10/10/20
Type here to search
Expert Solution
Step 1
Given data,
| X | Y | X*Y | X*X |
| 1 | 39 | 39 | 1 |
| 2 | 43 | 86 | 4 |
| 3 | 50 | 150 | 9 |
| 4 | 48 | 192 | 16 |
| 4 | 65 | 260 | 16 |
| 6 | 73 | 438 | 36 |
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