Need to find the correlation coefficient for this table
|
Subject
|
Times per week in library (X)
|
Grade (Y)
|
XY
|
X2
|
Y2
|
|
1
|
5
|
96
|
480
|
25
|
9216
|
|
2
|
4
|
92
|
368
|
16
|
8464
|
|
3
|
3
|
75
|
225
|
9
|
5625
|
|
4
|
5
|
100
|
500
|
25
|
10000
|
|
5
|
2
|
69
|
138
|
4
|
4761
|
|
6
|
4
|
86
|
344
|
16
|
7396
|
|
7
|
4
|
91
|
364
|
16
|
8281
|
|
8
|
3
|
77
|
231
|
9
|
5929
|
|
9
|
2
|
65
|
130
|
4
|
4225
|
|
10
|
5
|
97
|
485
|
25
|
9409
|
|
?
|
37
|
848
|
3745
|
149
|
73306
|
Sum of X = 37
Sum of Y = 848
Sum of XY = 3745
Sum of X2 = 149
Sum of Y2 = 73306
N = 10