Posted by **rodrigo** on Thursday, September 29, 2011 at 6:54pm.

A job in an insurance office involves telephone conversations with policyholders. The office manager estimates that about half of the employee’s time is spent on the telephone. How many observations are needed in a work sampling study to estimate that time percentage to within 6 percent and have a confidence of 98 percent?

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**Travis**, Sunday, July 22, 2012 at 8:10pm
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