Standard error of mean-confidence interval

Reference no: EM13105153

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

Reference no: EM13105153

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