Refer to Exercise 8.32. a. Find a 90% confidence interval for . b. Why is the confidence
Question:
a. Find a 90% confidence interval for μ.
b. Why is the confidence interval you found in part (a) shorter than the one in Exercise 8.32?
c. Draw a graph similar to that shown in Fig. 8.5 on page 315 to display both confidence intervals.
d. Which confidence interval yields a more precise estimate of μ? Explain your answer.
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