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May 27, 2015

Homework Help: statistics

Posted by tammy on Sunday, April 29, 2012 at 6:20pm.

You are designing a study to determine whether music has an effect on learning. Previous research indicates that the standard deviation to learn a task is 3.4 minutes. How many subjects would you need to ensure with 90% confidence that the estimate is within 1 minute of the true mean time required?

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