Question: The random sample shown below was selected from a normal distribution. 7, 7, 3, 5, 8, 6 a. Construct a 90% confidence interval for the

The random sample shown below was selected from a normal distribution.

7, 7, 3, 5, 8, 6

a. Construct a 90% confidence interval for the population mean .

b. Assume that sample mean x and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of n=25 observations. Repeat part a. What is the effect of increasing the sample size on the width of the confidenceintervals?

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