Chapter 9: Discrete probability distributions Notes

Sections

1. 9A Probability distributions Mastered

   Discrete random variables, probability distribution tables and graphs, the condition that probabilities add to 1, and relative frequencies as estimates of probabilities.

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2. 9B Expected value Mastered

   The mean or expected value of a discrete random variable, symmetric distributions, fair games and expected gain, and the expected value of a linear function aX + b.

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3. 9C Variance and standard deviation Mastered

   The variance and standard deviation of a discrete random variable, the two formulas for variance, and the variance of a linear function aX + b.

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