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2 February, 01:37

Which of the following choices is the standard deviation of the sample shown

here?

19, 20, 21, 22, 23

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  1. 2 February, 01:47
    0
    Mean = (19 + 20 + 21 + 22 + 23) / 5 = 105/5 = 21

    x x - mean (x - mean) ^2

    19 - 2 4

    20 - 1 1

    21 0 0

    22 1 1

    23 2 4

    Sum = 10
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