Head First Statistics

Index

A note on the digital index

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Symbols

| symbol (see conditional probabilities)

∩ intersection

finding, Trees also help you calculate conditional probabilities

P(A ∩ B) versus P(A | B), Trees also help you calculate conditional probabilities

P(Black ∩ Even), We can find P(Black l Even) using the probabilities we already have

P(Even), We can find P(Black l Even) using the probabilities we already have

1/p, expectation, Expectation is 1/p

λ

when large, When to approximate the binomial distribution with the normal

when small, When to approximate the binomial distribution with the normal

λ distribution (see Poisson distribution)

μ (mu), Back to the mean, Point estimators can approximate population parameters

confidence intervals, Start by finding Z

v (nu), Two main uses of the χ2 distribution

degrees of freedom, v represents degrees of freedom

Σ (sigma), Dealing with unknowns

mean, Dealing with unknowns

σ (sigma), ...but standard deviation is a more intuitive measure

χ2 (chi square), Hypothesis testing with χ2

χ2 (chi square) distribution, The χ2 Distribution: There’s Something Going On...

cheat sheet, You’ve solved the slot machine mystery

contingency table, You can find the expected frequencies using ...