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August 31, 2015

Homework Help: statistics

Posted by Susan on Saturday, March 10, 2012 at 3:21pm.

1. A test has a mean of 50, standard deviation of 10.
A. What scores separate the middle 25% from the rest
b. What proportion would be expected to score between 45 and 55
c. What proportion would be expected to score 68 and above

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