Refer to Review Exercise 5.70. Suppose there is concern
Chapter , Problem 5.71(choose chapter or problem)
Refer to Review Exercise 5.70. Suppose there is concern about whether the point estimate p = 8/30 is accurate enough because the confidence interval around p is not sufficiently narrow. Using p as the estimate of p, how many companies would need to be sampled in order to have a 95% confidence interval with a width of only 0.05?
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