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March 1, 2015

Posted by **StudentD** on Wednesday, August 15, 2012 at 12:34pm.

A. 68%

B. 80%

C. 95%

D. 99%

- statistics -
**PsyDAG**, Thursday, August 16, 2012 at 1:56pmYou haven't memorized the proportion within 2 standard deviations from the mean?

Z = (score-mean)/SD

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

- statistics -
**Anonymous**, Tuesday, July 8, 2014 at 7:51pm12

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