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March 28, 2015

Homework Help: Statistics

Posted by Lyndyc on Thursday, December 5, 2013 at 8:16pm.

A normal distribution has a mean of = 100 with = 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 110?
a. 0.6915
b. 0.3085
c. 0.1915
d. 0.3830

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