Homework Help: statistics

Posted by Barbara on Sunday, October 9, 2011 at 9:49pm.

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 7 of the 50 sampled hold two or more jobs.

How many in the workforce should be interviewed to meet your requirements?

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