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A random sample of 11 students produced the following data, where z is the hours spent per month playing video games,
and y is the first semester grade (out of a maximum of 80 points). The data are presented below in the table of values.
H
13
16
17
19
21
23
24
25
angwer below
27
29
32
Y
61
78
72
53
64
64
55
53
38
44
42
What is the value of the correlation coefficient, r, rounded to four decimal places?

Sagot :

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