Answer question 17 Marks (in Maths)
Marks 22 25 34 28 26 30 32 30 28 34 36 40
Ir = 0.7831
Q.13. The height of fathers and sons are given below:
67 68 69 71 73
Height of fathers (in inches): 65 66 67
67 686468 72706-970
Height Of SONS (in inches)
Calculate Karl Pearson's coefficient Of correlation.
Q. 14. Find Karl Pearson's coefficient of correlation from the following index numbers and interpret
100 101 103 102 IDO 99 97 98 96 95
wages R)
Costofliving: 98 99 99 97 95 92 95 94 90 91
Q. IS. Find the product moment correlation between sales and expenses Of the following 10 firms.
Firms
Expenses
50 50 55 60 65 65 65 60 60 50
14
16 15 15
[r +0.7971
Q.16. Calculate the coefficient of correlation for the following ages Of husbands and wives in
years at the time of their marriage,
Age Of husLwnds
Age Of Wives
23 27 28 28 29 30 313335 36
20 22 27
21 29 27 29 28 29
Q.17. Find Karl Pearson's coefficient of correlation for the following data:
Fertilizers used (in
Prmiuctivity (in tons)
15 18 20 24 30 35
85 90 95 105 120 130
40
150
50
160