Homework Help: Statistics

Posted by Robby on Saturday, May 14, 2011 at 9:42pm.

Suppose that weights are bell shaped with a mean of 120 pounds and a standard deviation of 10 pounds. What percentage of weights is between 110 and 130 pounds

Statistics - PsyDAG, Sunday, May 15, 2011 at 11:59am
Z = (score-mean)/SD

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

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