MATH 225N statistics week 4 contengency tables QUESTIONS WITH COMPLETE SOLUTIONS

MATH 225N statistics week 4 contengency tables QUESTIONS WITH COMPLETE SOLUTIONS contingency tables - Answer data matrix used to distinguish among population proportions when data is characterized in 2 ways, giving row and column data test of independence - Answer tests H0 that the row variable and column variable in a contingency table are not related test of homogeneity - Answer tests the claim that different populations have the same proportions of some characteristic Test of independence - Answer independence or homogeneity; when one large sample (size=n) is drawn, so that both row and column totals are determined randomly Test of homogeneity - Answer independence or homogeneity; when predetermined sample sizes are used for the different populations side - Answer contingency tables; location in data matrix for populations top - Answer contingency tables; location in data matrix for variable being measured (r-1)*(c-1) - Answer degrees of freedom in contingency tables r - Answer symbol; number of rows c - Answer symbol; number of columns right-tailed - Answer direction of contingency table tests E - Answer ((row total)*(column total))/(grand total) = grand total - Answer total number of all observed frequencies in the table E - Answer symbol; expected value n - Answer symbol; number of possibilities p - Answer symbol; probability of the event E - Answer n*p =