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Tabulation, grouping, recoding General table(x) Frequency table of vector (factor) x table(x, y) Crosstabulation of x and y xtabs(~ x + y) Formula interface for crosstabulation: use summary() for chi-square test factor(x) Convert vector to factor lm(y ~ x) cut(x, breaks) Groups from cutpoints for continuous ^In many cases, judges review the statistical analysis produced by consultants, as presented and critiqued by competing expert witnesses on behalf of the parties at trial. Floor. The whys, wheres, and hows. Cheat Sheet for Statistics 101 Why is having some background in statistics important? 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