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Khan Academy on a Stick
ck12.org Normal Distribution Problems: z-score
Z-score practice
Normal distribution
Introduction to the Normal Distribution
Normal Distribution Excel Exercise
ck12.org Normal Distribution Problems: Qualitative sense of normal distributions
ck12.org Normal Distribution Problems: Empirical Rule
ck12.org Normal Distribution Problems: z-score
ck12.org Exercise: Standard Normal Distribution and the Empirical Rule
ck12.org: More Empirical Rule and Z-score practice
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