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A single sample is being used to construct a 90% confidence interval for the population mean. What would be the difference between an interval for a sample of n = 25 and the interval for a sample of n = 100? Assume that all other factors are held constant.

Options:

With n = 25, the standard error would be larger and the interval would be wider.

With n = 25, the standard error would be smaller and the interval would be narrower.

With n = 25, the standard error would be smaller and the interval would be wider.

With n = 25, the standard error would be larger and the interval would be narrower.

  • statistics -

    SEm = SD/√n

    This should allow you to answer the question.

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