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ZIMSEC A-Level Statistics

6.4Discrete random variables

Discrete random variables in ZIMSEC A-Level Statistics: what the syllabus expects you to know, the learning objectives and how to practise.
Topic83 practice questions4 lessons

In this topic

Lessons

  • Discrete random variables: expectation and variance

    45 min

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  • The binomial distribution

    50 min

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  • The geometric distribution

    40 min

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  • The Poisson distribution

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Discrete random variables: sample question

1 mark

X∼B(8,0.4)X \sim \mathrm{B}(8, 0.4). Find P(X=3)\mathrm{P}(X = 3), correct to 3 significant figures.

Only if the answer has a unit, e.g. cm or km/h.

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