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6 February, 13:27

Suppose σ=36 and sample size n = 81. what is the standard error (s. e) of x ̅?

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  1. 6 February, 13:50
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    The standard error of the mean is labelled as: σM. The formula for the standard error is: where σ is the standard deviation of the original distribution and n is the sample size. The formula is σ / square root n

    So the given in our problem is:

    σ=36

    n = 81

    Standard Error = 36 / sqrt81

    = 36 / 9

    = 4
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