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April 21, 2014

Homework Help: statistics

Posted by Aditi on Friday, June 24, 2011 at 1:58am.

mean = 60 wpm
standard deviation= 15 wpm

a.What is the probability that a randomly selected typist's net rate is at most 60 wpm? less than 60 wpm?

b. What is the probability that a randomly selected is between 45 and 90 wpm?

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