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Monthly Archives: January 2015

THE ABBY NORMAL (OR, IS IT NORMAL?) DISTRIBUTION AND WHAT IT REALLY MEANS

Ah, yes, well, it is the normal distribution! And, as a reminder, and if you will recall,¬† the previous posting (http://www.iephelp.com/2014/12/test-scores-mean-mean/) explained the "mean" from which all test scores are based and is key to the normal distribution. Different tests often report scores in a variety of ways and we want to understand what those…
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