chisquare               R function for chi-square and G-square test of
                        independence, measures of association, and
                        standardized/moment-corrected
                        standardized/adjusted standardized residuals
diseases                Dataset: Cross-tabulation of quantity of
                        tobacco smoked daily vs. cause of death
safety                  Dataset: Cross-tabulation of people's feeling
                        of safety vs. town size
social_class            Dataset: Cross-tabulation of social class vs.
                        diagnostic category for a sample of psychiatric
                        patients
