lcatherine24
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- Mar 21, 2011
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I am having a difficult time answering this question... Could someone help me figure it out?
A direct mail sales company must determine its credit policies quite carefully. Suppose that the firm suspects that advertisements in a certain magazine have led to an excessively high rate of right offs. The firm wants to establish a 90% confidence interval for this magazine's write off proportion that is accurate to within 2% of the true proportion. How large of a sample is necessary?
A direct mail sales company must determine its credit policies quite carefully. Suppose that the firm suspects that advertisements in a certain magazine have led to an excessively high rate of right offs. The firm wants to establish a 90% confidence interval for this magazine's write off proportion that is accurate to within 2% of the true proportion. How large of a sample is necessary?