In this video, Salman Khan of Khan Academy explains binomial distribution. Part 3 of 4.
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Khan Academy
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Provides a calculator for calculating standard deviation, variation, and mean given other information.
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Easy Calculation
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Gives a detailed explanation through images on working with standard deviation and variance.
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Math is Fun
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A link to the Z-Distribution table with a brief explanation on using it.
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Math.com
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Gives a virtual video tutorial on working on statistics and probability problems involving the fundamental counting principle.
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Class Brain
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This gives a general description of standard deviation.
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Robert Niles
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Definition of Null Hypothesis
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Math World
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Introduction and comparison of z-tests and t-tests.
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Online Statistics: University of Leicester
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