<PRE><B>Question 923655</B>
You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 90 percent confidence level and state that the estimated proportion must be within 2 percent of the population proportion. A pilot survey reveals that 5 of the 48 sampled hold two or more jobs.
 

How many in the workforce should be interviewed to meet your requirements? (Round up your answer to the next whole number.)
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Formula::
Since E = z*s/sqrt(n)
E = z*sqrt(pq/n)
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n = [z/E]^2*pq
n = [1.645/0.02]^2*(5/48)(41/48)
n = 602 when rounded up
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Cheers,
Stan H.
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