Eight students, randomly selected from a large class, were asked to keep a record of the hours they spent studying before their final exam. The following table gives the number of hours they studied before the finals and their scores on the final exam. Number of Final exam Student hours XY score (y) x2 y2 (x) 1 15 97 1455 225 9409 2 7 78 546 49 6084 12 87 1044 144 7569 4 92 736 64 8464 18 89 1602 324 7921 57 342 36 3249 7 74 666 81 5476 8. 11 70 770 121 4900 Total 86 644 7161 1044 53072 6 9, 6
Eight students, randomly selected from a large class, were asked to keep a record of the hours they spent studying before their final exam. The following table gives the number of hours they studied before the finals and their scores on the final exam. Number of Final exam Student hours XY score (y) x2 y2 (x) 1 15 97 1455 225 9409 2 7 78 546 49 6084 12 87 1044 144 7569 4 92 736 64 8464 18 89 1602 324 7921 57 342 36 3249 7 74 666 81 5476 8. 11 70 770 121 4900 Total 86 644 7161 1044 53072 6 9, 6
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
What is the value of r?
a) 0.6802
b) 0.6208
c) 0.6280
d) 0.6820
![Eight students, randomly selected from a large class, were asked to keep a record of the hours they spent studying
before their final exam. The following table gives the number of hours they studied before the finals and their scores
on the final exam.
Number of
Final exam
Student
hours
XY
score (y)
x2
Y2
(x)
1
15
97
1455
225
9409
7
78
546
49
6084
3
12
87
1044
144
7569
4
92
736
64
8464
18
89
1602
324
7921
6.
57
342
36
3249
7
74
666
81
5476
8
11
70
770
121
4900
Total
86
644
7161
1044
53072](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F74129603-9827-4c5f-b842-6804f36d8c33%2F9ea0a91e-67d5-4c9b-9ffc-e77f7b51a64d%2Fnfmynn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Eight students, randomly selected from a large class, were asked to keep a record of the hours they spent studying
before their final exam. The following table gives the number of hours they studied before the finals and their scores
on the final exam.
Number of
Final exam
Student
hours
XY
score (y)
x2
Y2
(x)
1
15
97
1455
225
9409
7
78
546
49
6084
3
12
87
1044
144
7569
4
92
736
64
8464
18
89
1602
324
7921
6.
57
342
36
3249
7
74
666
81
5476
8
11
70
770
121
4900
Total
86
644
7161
1044
53072
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