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The mean and standard deviation of a random sample of n measurements are equal to 33.9 and 3.3, respectively. a. Find a 95% confidence interval

The mean and standard deviation of a random sample ofnmeasurements are equal to 33.9 and 3.3, respectively.

a.Find a 95% confidence interval for ifn = 100.

b.Find a 95% confidence interval for ifn = 400.

c.Find the widths of the confidence intervals you calculated in partsaandb. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence coefficient fixed?

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