Homework Help: statistics

Posted by Shelly on Thursday, March 15, 2012 at 9:19pm.

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people.
(a) How many would you expect to be between 158 and 172 cm tall?

statistics - PsyDAG, Friday, March 16, 2012 at 12:58pm
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 Z scores. Multiply that by 80.

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