A work sampling study is needed that will estimate the percentage of time a postal clerk spends selling stamps as opposed to other duties. Determine the necessary sample size to estimate that proportion with a confidence of 99.74 percent to within 3 percent, for these cases:
(1) No information is currently available concerning that proportion.
(2) The proportion is probably no more than 15 percent.

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The Answer of A work sampling study is needed that will estimate the percentage of time a postal clerk spends selling stamps as opposed to other duties. Determine the necessary sample size to estimate that proportion with a confidence of 99.74 percent to within 3 percent, for these cases:
(1) No information is currently available concerning that proportion.
(2) The proportion is probably no more than 15 percent.

A Work Sampling Study Is Needed That Will Estimate the Percentage