Question

The New Jersey Department of Transportation (NJDOT) believes that there are differences of opinion among the officials of different counties about expansion of public transportation in the state. Therefore, NJDOT has decided to take a sample of the officials for interview, and has planned to select a random sample of officials from each county in New Jersey. This is an example of a Group of answer choices

Simple random sample

Cluster sample

Stratified random sample

Systematic sample

Convenience sample

Answer 1

Answer :- Stratified random sample

stratified sampling is a method of sampling from a population which can be partitioned into subpopulations.

Stratified sampling refers to a type of sampling method . With stratified sampling, the researcher divides the population into separate groups, called strata. Then, a probability sample (often a simple random sample ) is drawn from each group.