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September 18, 2014

September 18, 2014

Posted by **aman** on Monday, April 22, 2013 at 3:39am.

- statistics -
**PsyDAG**, Monday, April 22, 2013 at 9:07amHow was the sample taken? If the observations are taken on a chance basis, then it would be random.

Or are you asking if the sample is within certain range of possible sample means?

Z = (score-mean)/SEm

SEm = SD/√n

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

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