Wednesday

August 20, 2014

August 20, 2014

Posted by **donna hull** on Thursday, February 21, 2013 at 10:00pm.

- statistics -
**JJ**, Friday, February 22, 2013 at 9:38amWe need to know some other information. Like the mean and standard deviation for these scores.

subtract the mean from 37.5 and divide by the standard deviation to get a z-score.

do the same for 39.

Use a z-table to find the percentage of scores that will be between the two numbers.

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