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Question

Find the rank correlation coefficient between the heights of fathers and sons from the following data:

Heights of fathers in inches 6566676768697072
Height of sons in inches6768656872726971

A
0.67
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B
0.58
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C
0.42
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D
0.92
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Solution

The correct option is B 0.58

Height(Father)

Rank

Height(Son)

Rank

|d|

d2

65

66

67

67

68

69

70

72

8

7

5

5

4

3

2

1

67

68

65

68

72

72

69

71

7

5

8

5

1

1

4

3

1

2

3

0

3

2

2

2

1

4

9

0

9

4

4

4

n=08,d2=35

r=16d2n(n21)=16×358(821)=1210504=0.58


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