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6 January, 17:01

A study of commuting times reports the travel times to work of a random sample of 20 employed adults in New York State. The mean is x⎯⎯⎯ = 31.25 minutes and the sample standard deviation is s = 23.7 minutes. What is the standard error of the mean?

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  1. 6 January, 18:39
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    The standard error of the mean = 5.14 mins

    Step-by-step explanation:

    Number of random sample (n) = 20

    Mean (X) = 31.25 mins

    Standard deviation (α) = 23.7 mins

    Standard error of mean =

    standard deviation / √sample size

    = 23.7/√20

    = 23.7/4.4721

    = 5.14 mins
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