IN THIS PART . . .

Compare averages between two or more groups using

t tests, ANOVAs, and nonparametric tests.

Compare proportions between two or more groups

using the chi-square and Fisher Exact tests.

Analyze fourfold tables (also known as 2x2 cross-tabs)

to estimate relative risk using odds ratios, cumulative

incidence ratios, and other useful measures of

association.

Compare event rates, also known as person-time data,

and estimate prevalence and incidence rates.

Infer causal relationships between the predictors

and the outcome from the results of your regression

model.