Suppose that the sample of students described in the previous section was actually selected using stratified random sampling. In stratified sampling, the study population is divided into ...

This is a preview. Log in through your library . Abstract The ratio of odds ratios in a 2 x 2 x 2 contingency table is applicable to both cohort and case-control studies as a measure of the ...

Suppose that the previous student sample is actually drawn from a stratified sampling. The strata are grades in the junior high school: the 7th grade, the 8th grade, and the 9th grade. Within strata, ...