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3 of 3 objectives have lessons · 0 studied · 0 secure
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Draw up a probability distribution table for a given situation involving a discrete random variable X, and calculate E(X) and Var(X).
Taught in: Expectation of a discrete random variable, Probability distributions for discrete random variables, Variance of a discrete random variable · 15 questions
Use formulae for probabilities for the binomial and geometric distributions, and recognise practical situations in which these distributions are suitable models.
Includes the notations B(n, p) and Geo(p). Geo(p) is the distribution with pᵣ = p(1 − p)^(r − 1) for r = 1, 2, 3, ….
Taught in: Mean and variance of the binomial distribution, The binomial distribution, The geometric distribution · 15 questions
Use formulae for the expectation and variance of the binomial distribution and for the expectation of the geometric distribution.
Proofs of the formulae are not required.
Taught in: Mean and variance of the binomial distribution, The geometric distribution · 6 questions