Discrete Probability Distributions: Calculating Mean, Variance, Standard Deviation, Expected Value

Calculating Mean of Probability Distribution

This video explains how to find the mean (average) of a probability distribution when you are given a table of outcomes and their corresponding probabilities, such as for survey results or a weighted coin.

Calculating Variance & Standard Deviation of Probability Distribution

This video explains how to find the variance and standard deviation of a probability distribution when you are given a table of outcomes and their corresponding probabilities, such as for survey results or a weighted coin.

Probability Distribution vs Histogram

This short video aims to clear up a common confusion: What's the difference between a distribution and a histogram?

"0+" Probability

This video explains a weird number that some math teachers like to use when talking about very small probabilities, instead of having to write "a really really tiny number" all the time.

Expected Value & E-Commerce 101

How do you make a decision between two different paths that have different probabilities of success but different payoffs? How do you place a value on website visitors if most of them never buy anything? And how is this different from weighted average? Stay tuned to find out.

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