Refer to Review Exercise 9.106. Suppose there is concern
Chapter 1, Problem 9.107(choose chapter or problem)
Refer to Review Exercise 9.106. Suppose there is concern about whether the point estimate p =8 /30 is accurate enough because the condence interval around p is not suciently narrow. Using p as the estimate of p, how many companies would need to be sampled in order to have a 95% condence interval with a width of only 0.05?
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