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April 20, 2014

Homework Help: statistics

Posted by DezShonna K on Friday, June 11, 2010 at 9:03pm.

The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally distributed variable.
Find the probability that one student selected at random is older than 23.
Find the probability that the mean age of a group of 16 students selected at random is bigger than 23

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