Homework Help: Statistics

Posted by Eric on Sunday, June 26, 2011 at 9:26pm.

In an advertisement, a shoe store claims that its mean online delivery time is less than 30 hours. A random selection of 36 delivery times has a sample mean of 28.5 hours and a standard deviation of 3.5 hours.

Statistics - PsyDAG, Monday, June 27, 2011 at 11:49am
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Life orientation - Panelope, Thursday, June 30, 2011 at 3:22pm
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