Poverty and Dietary Calcium. Refer to Exercise 8.70. a. Find a 90% confidence interval for . b.
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Poverty and Dietary Calcium. Refer to Exercise 8.70.
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 8.70?
c. Draw a graph similar to that shown in Fig. 8.6 on page 365 to display both confidence intervals.
d. Which confidence interval yields a more accurate estimate of μ?
Explain your answer.
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