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August 28, 2015

Homework Help: statistics

Posted by shasha on Friday, December 16, 2011 at 1:59am.

The times taken to complete a statistics test by all students are normally distributed with a mean of 120 minutes and a standard deviation of 12 minutes. Find the probability that the mean time taken to complete this test by a random sample of 16 students would be between 122 and 125 minutes.

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