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April 23, 2014

Homework Help: statistics

Posted by Gift on Thursday, March 8, 2012 at 5:46pm.

The time required by workers to complete an assembly job has a mean of 50 minutes and a standard deviation of 8 minutes. To spot check the workers' progress on a particular day, their supervisor intends to record the times 60 workers take to complete one assembly job apiece. What is the probability that the sample mean will be more than 52 minutes?

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