Homework Help: Statistics Math Help

Posted by Fred on Saturday, June 18, 2011 at 1:10am.

A distribution of 800 test scores in a biology course was approximately normally distributed with a mean of 35 and a standard deviation of 6. Calculate the proportion of scores falling between 20 and 40

Statistics Math Help - PsyDAG, Saturday, June 18, 2011 at 11:45am
Z = (score-mean)/SD

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

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