# statistics

True or False

If one score is randomly selected from a normal distribution with  = 100 and  = 20, the probability of obtaining a score between X = 80 and X = 120 is 0.3413.

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1. Z = (score-mean)/SD

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 scores.

Or you can go to http://davidmlane.com/hyperstat/z_table.html

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posted by PsyDAG
2. False

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