Refer to Exercise 8.30.
a. Calculate the width of a 90% confidence interval for µ when n = 100.
b. Calculate the width of a 99% confidence interval for µ when n = 100.
c. Compare the widths of 90%, 95%, and 99% confidence intervals for µ. What effect does increasing the confidence coefficient have on the width of the confidence interval?
Reference:
Compare the confidence intervals in Exercise 8.29. What effect does each of these actions have on the width of a confidence interval?
a. Double the sample size
b. Quadruple the sample size
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