Question: Prison Sentences. Refer to Problem 21. a. Find the margin of error, E. b. Explain the meaning of E as far as the accuracy of

Prison Sentences. Refer to Problem 21.

a. Find the margin of error, E.

b. Explain the meaning of E as far as the accuracy of the estimate is concerned.

c. Determine the sample size required to have a margin of error of 1.2 year and a 90% confidence level.

d. Find a 90% confidence interval for μ if a sample of the size determined in part

(c) yields a mean of 32.5 years.

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