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    Standard Error of Mean and Confidence Interval

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    1. Use the information given to calculate the standard error of the mean. Mean systolic blood pressure for a sample of n=324 men is =123.5, and the standard deviation is s=9.

    2. If each of the following is decreased but everything else remains the same, will a confidence interval become wider, will it become narrower, or will the width remain the same? Explain?
    a.) The sample estimate
    b.) The standard error
    c.) The confidence interval

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    https://brainmass.com/statistics/confidence-interval/standard-error-mean-confidence-interval-358649

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