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February 1, 2015

February 1, 2015

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

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?

- statistics -
**PsyDAG**, Friday, June 24, 2011 at 11:49amZ = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.

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