Q. 4. Find the correlation coefficient between X and Y X 57 58 59 59 60 61 62 64 Y 77 78 75 78 82 82 79 81

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Q. 4. Find the correlation coefficient between X and Y X 57 58 59 59 60 61 62 64 Y 77 78 75 78 82 82 79 81

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Remi 2 months 2021-11-28T14:35:05+00:00 1 Answer 0 views 0

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    2021-11-28T14:36:10+00:00

    0.6 is correlation coefficient between x and y

    Step-by-step explanation:

    x 57 58 59 59 60 61 62 64

    x mean = 60

    y 77 78 75 78 82 82 79 81

    y mean = 79

    x y a=x – xmean b= y – ymean a² b² ab

    57 77 -3 -2 9 4 6

    58 78 -2 -1 4 1 2

    59 75 -1 -4 1 16 4

    59 78 -1 -1 1 1 1

    60 82 0 3 0 9 0

    61 82 1 3 1 9 3

    62 79 2 0 4 0 0

    64 81 4 2 16 4 8

    Total 36 44 24

    Correlation coefficient = 24/(√36*√44)

    = 2/√11

    = 0.6

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