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

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...

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

Answered Same DayDec 22, 2021

Answer To: 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...

David answered on Dec 22 2021

120 Votes

Sol:
We know that correlation coefficient is given as,

    
   
2 22 2
N xy x y
r
N x x N y y


    
      
  
   

Given that,
...

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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...

Answer To: 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...

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