An oil company is interested in estimating the true proportion of female truck d

Question

An oil company is interested in estimating the true proportion of female truck drivers based in five southern states. A statistician hired by the oil company must determine the sample size needed in order to make the estimate accurate to within 1% of the true proportion with 99% confidence. What is the minimum number of truck drivers that the statistician should sample in these southern states in order to achieve the desired accuracy? Use the appropriate table in your book.

An oil company is interested in estimating the true proportion of female truck drivers based in five southern states. A statistician hired by the oil company must determine the sample size needed in order to make the estimate accurate to within 1% of the true proportion with 99% confidence. What is the minimum number of truck drivers that the statistician should sample in these southern states in order to achieve the desired accuracy? Use the appropriate table in your book.

Explanation / Answer

n = [z/E]^2*pq
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Since no p estimate is available the "least biased" estimate is p = 1/2
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n = [2.575/0.01]^2(1/2)(1/2)
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n = 16576 here 2.575 resembels the z-score for 99% confidience interval, iam not sure of its valur please check it

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