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6 August, 23:00

The numbers of members in 6 yoga clubs are 80, 74, 77, 71, 75, and 91. Find the population standard deviation of the numbers of members to the nearest tenth.

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  1. 7 August, 00:40
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    Mean = 78

    x - mean squared

    80-78 = 2 4

    74-78 = - 4 16

    77-78 = - 1 1

    75-78 = - 3 9

    91-78 = 13 169

    Total 199

    standard deviation = square root (199/6) = 5.8 to nearest tenth
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