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Revision Pack Test Series

AA HL / Working with data

Working with data

Averages, spread, and a regression line read from a scatter graph.

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Unit formula summary

Binomial mean and variance

\(E(X)=np,\quad \mathrm{Var}(X)=np(1-p)\)
Binomial probability

\(P(X=r)=\binom{n}{r}p^r(1-p)^{n-r}\)
Mean of a data set

\(\bar{x} = \frac{\sum x}{n}\)
Standardised value

\(z = \frac{x-\mu}{\sigma}\)

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