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    Estimating a Population Proportion Margins of Error

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    For each of the following situations, determine the margin of error:

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    a. X = 2.47, and n = 12, confidence coefficient = 0.98, σ = 6.58
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    b. X = 13.9, and n = 21, confidence coefficient = 0.95, s = 2.33
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    c. X = 114.7, and n = 500, confidence coefficient = 0.80, s = 15.6

    If you wish to estimate a population mean and have your estimate be within ±0.25 of the true value and you wish to have a confidence level of 99%, what sample size will be required if the population standard deviation is known to be 1.20?

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    https://brainmass.com/statistics/hypothesis-testing/estimating-a-population-proportion-margins-of-error-142842

    Solution Summary

    The solution determines the margin of error for three different examples.

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