Question: 2. For a data set obtained from a random sample, n = 81 and x = 48.25. It is known that = 4.8. A. What

2. For a data set obtained from a random sample, n = 81 and x = 48.25. It is known

that = 4.8.

A. What is the point estimate of ? Round to two decimal places.

B. Make a 95% confidence interval for . What is the lower limit? Round to two decimal places.

C. Make a 95% confidence interval for . What is the upper limit? Round to two decimal places.

D. What is the margin of error of estimate for part b? Round to two decimal places.

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