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8 January, 09:34

The standard deviation of a population is known to be 7.8. If the sample size I'd 85, what is the standard error of the mean

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  1. 8 January, 10:04
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    The standard error of the mean is 0.85.

    Step-by-step explanation:

    The given standard deviation of a population (σ) = 7.8

    sample size (N) = 85

    We have to find standard error of the mean.

    The formula to find standard error of the mean

    = (standard deviation of the distribution) / (square root of sample size)

    = (σ) / (√N)

    = 7.8 / (√85)

    = 7.8 / 9.219544457

    = 0.8460

    = 0.85 (approximately taken to two decimal places)

    We have got the required answer.

    The standard error of the mean is 0.85.
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