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QUESTION

A large corporation wants to estimate the proportion of independent contractors who use a personal digital assistant (PDA).

A large corporation wants to estimate the proportion of independent contractors who use a personal digital assistant (PDA).They want to be within 4% of the true porportion when using a confidence level of 95%.How many contractors must be sampled if no preliminary estimate is available? **Remember when calculating a sample size, we need to round UP to the next whole number (not the closest whole number) if needed.

The number of contractors that must be sampled is n 0.04 = 0.5 × 0.5n Solving for n, we get n=157
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