ZIMSEC · Form 5 · Lower 6 · Syllabus 6046
Statistics
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- Representation and summary of data Qualitative and quantitative; discrete and continuous. Displays: stem-and-leaf diagrams, histograms (frequency density = frequency ÷ class width), box-and-whisker plots and cumulative frequency graphs.
- Probability Multiply along branches; add the end results. Venn diagrams organise overlapping events.
- Permutations and combinations P = favourable selections ÷ total selections.
- Discrete random variables, binomial and Poisson distributions A probability distribution lists values x with probabilities summing to 1.
- The normal distribution X ~ N(μ, σ²) is continuous, symmetrical and bell-shaped about the mean μ. About 68% of values lie within 1σ of the mean, 95% within 2σ (1.96σ exactly) and 99.7% within 3σ.