A sample in which the population it grouped according to a v

A sample in which the population it grouped according to a variable to that each subgroup has a(n) percentage of cases in the sample and the population it called a sample. equal, random unequal, stratified random equal, stratified random equal, representative

Solution

OPTION 3: EQUAL, STRATIFIED RANDOM [ANSWER]

This answer is by definition of the stratified random sampling.