Essay
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:
(i)No information is currently available concerning that proportion.
(ii)The proportion is probably no more than 15 percent.
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n = (z/a)² [p(1 - p)] (i)assum...View Answer
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