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12 July, 19:16

What size sample should we draw from a population with standard deviation of 15 to have a sampling distribution standard error of 1.875?1564288

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  1. 12 July, 19:31
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    Answer: n = 64

    Step-by-step explanation:

    Standard error (SE) of a statistical data is the standard deviation of its sampling distribution.

    S. E = r/√n ... 1

    Where,

    SE = standard error

    r = standard deviation

    n = number of samples

    Given:

    r = 15

    SE = 1.875

    From equation 1, making n the subject of formula:

    n = (r/SE) ^2

    n = (15/1.875)

    n = 64
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