Cheat Sheet - NEED UNITS NEED RANGE READ INSTRUCTIONS CHECK...

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Unformatted text preview: NEED UNITS!!! NEED RANGE!!! READ INSTRUCTIONS!!! CHECK CALCULATIONS!!! Key Concepts:- When we reject H , the results are statistically significant- Pairing leads to more sensitive tests when d varies little and individuals differ largely- Symmetry, centrality, variability(data spread), outliers, modality • Histograms: height = relative frequency/base width; number of intervals = sqrt(n) • Sample Variance: Sample Correlation Coefficient: • Fourth Spread: s f = upper fourth – lower fourth • Probability:- Definition: In hypothetical, repeatable, identical trials, P(A) = longterm relative freq of A- DeMorgan’s Law: - Let n = - Independence: P(AB) = P(A)P(B); Mutually Exclusive: P(AB) = 0; Conditional: P(A|B) = P(AB)/P(B) • Random Variables and Probability Distributions- Discrete: pmf: p(x) = P(X=x); Both: cdf: F(x) = P(X<=x); Continuous: pdf- Expectation: - Variance: - Binomial:- Poisson:- Uniform:- Normal:- Gamma:- Joint Distributions • Central Limit Theorem (CLT): Let m x...
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Cheat Sheet - NEED UNITS NEED RANGE READ INSTRUCTIONS CHECK...

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