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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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