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December 21, 2014

December 21, 2014

Posted by **Kim** on Thursday, October 27, 2011 at 10:56pm.

- statistics -
**PsyDAG**, Friday, October 28, 2011 at 11:22amThe interval = mean ± 17%.

Z = (score-mean)/SEm

SEm = SD/√(n-1)

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.17) between Z score and mean. Insert the values in the first equation and calculate.

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