Homework Help: Math computations

Posted by Ronni on Friday, March 15, 2013 at 12:49am.

An examination is normally distributed with a mean score of 77 and a deviation of 6. find the percent of individuals scoring as indicated below:
between 71-83
between 83-65
above 89
less than 65
between 77 and 65

Math computations - PsyDAG, Friday, March 15, 2013 at 11:28am
Z = (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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