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August 20, 2014

August 20, 2014

Posted by **Livia** on Sunday, November 27, 2011 at 9:05pm.

Give your answers as decimals, to two places

- statistics -
**PsyDAG**, Monday, November 28, 2011 at 11:38am90% = mean ± 2.035 SD

2.035 was found by finding table in the back of a statistics text labeled something like "areas under normal distribution" to find the proportion (.45) between score and mean to get the Z score (value in terms of standard deviation).

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