# Question

Refer to Problem 15.

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 0.1 mm 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 12.0 mm.

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 0.1 mm 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 12.0 mm.

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