Mathematical Methods · Unit 3 · Discrete random variables · General discrete random variables
Model and solve problems that involve discrete random variables and associated probabilities, with and without technology.
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Determine and use the variance of a discrete random variable as a measure of spread, 𝑉𝑎𝑟 (𝑋) = ∑ 𝑝𝑖 (𝑥𝑖 − 𝜇)2 where 𝑝𝑖 is the probability of outcome 𝑥𝑖 occurring, 𝜇 is the mean.
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Understand the concepts of a discrete random variable and its associat ed probability function, and its use in modelling data.