Statistics 1770 Lecture : Sept 13.docx
Document Summary
Evidence of an association (dependence: two variables have an association, or relationship, if a particular value for one variable is more likely to occur with certain values of the other variable. (i. e the distribution of one variable is not the same for all categories of the variable, if a pregnant woman who consumes >200 mg of caffeine is more likely o have a miscarriage than woman consuming less caffeine, that is going to suggest an association, two variables have an association, or relationship, if two or more rows in the contingency table have different distributions of row percentages, or equivalently if two or more columns have different distributions of column percentages (i. e the conditional distributions are not the same) 300: a) what percentage of all applicants were asian, 292/1755 = . 17, b) what percentage of the students accepted were asian, 110/931, c) what percent of asian were accepted, 110/292, d) what percent of all students were accepted, 931/1755.
