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An experiment involves selecting a random sample of 256 middle managers at random for study. one item of interest is their mean annual income. the sample mean is computed to be $35,420 and the sample standard
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An experiment involves selecting a random sample of 256 middle managers at random for study. one item of interest is their mean annual income. the sample mean is computed to be $35,420 and the sample standard deviation is $2,050. what is the standard error of the mean?

User Alex Stiff
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1 Answer

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The standard error of the mean is 128.125.

The formula for standard error is:


\sigma_M=(\sigma)/(√(N))

With our information, we have:


\sigma_M=(2050)/(√(256))=128.125.
User MeMyselfAndI
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