How to calculate z scores used in statistics class

Tutorial on how to calculate z scores. A z score measures the distance, in standard deviations, a specific observation is from the mean.

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Playlist on z scores : http://www.youtube.com/course?list=EC6157D8E20C151497

Related Video: How to Read a Normalized Table
http://www.youtube.com/watch?v=dWu0KLXuEpA

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