Statistical Sciences 1024A/B Lecture Notes - Lecture 6: Contingency Table, Perjury, Larceny
14 May 2016
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Example: u. s. survey of youth in custody (1987) 4 = public order (weapons violation, perjury, failure to appear in court) 5 = juvenile offence (truancy, running away, incorrigible behavior) The cross tabulation shows the number that fall into each category defined by race and each category defined by type of crime: marginal distribution. Summarizes each categorical variable in a two-way table, separated by studying the row totals and the column totals: expressed in counts or percentages (they are written as if in a margin). The marginal distributions can then be displayed on separate bar graphs, typically expressed as percents instead of raw counts. Each graph represents only one of the two variables, completely ignoring the second one. Race (row variable) calculate the counts for each type of race in the given table these are the row totals calculate proportions or percentages.
