The random sample shown below was selected from a normal distribution. 3, 6, 5, 9, 9,...

The random sample shown below was selected from a normal distribution. 3, 6, 5, 9, 9, 4 Complete parts a and b.

a. Construct a 95% confidence interval for the population mean mu.

b.Assume that the sample mean x and sample standard deviation s remain 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 confidence intervals?

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The random sample shown below was selected from a normal distribution. 3​, 6​, 5​, 9​, 9​,...

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The random sample shown below was selected from a normal distribution. 3, 6, 5, 9, 9,...