What is the defining characteristic of a sample selected using proportionate stratified random sampling?

In proportionate stratified random sampling, a researcher selects an equal number of participants from each subgroup, regardless of how large or small each subgroup is in the overall population.

A university researcher is conducting a study on student wellness and wants to use proportionate stratified random sampling. The student population is divided into four distinct strata based on their year of study. If the researcher intends to recruit a total sample size of $N = 600$, match each population percentage to the specific number of participants required to ensure the sample proportions perfectly mirror the population proportions.

To ensure a research design meets the rigorous standards of 'proportionate' stratified random sampling, a researcher must execute a specific logical sequence. Arrange the following steps in the order that guarantees the final sample proportions will perfectly mirror the population proportions.

If a specific demographic group makes up exactly $12.6\%$ of the national population, which sampling method guarantees that they will also constitute exactly $12.6\%$ of the research study's final sample?

In a psychology study using proportionate stratified random sampling, if a specific minority group represents exactly $3\%$ of the overall population, the researcher must ensure that this same group constitutes exactly $3\%$ of the final sample, even if that results in a very small number of participants for that specific stratum.

A researcher is investigating campus climate at a university where 30% of the student body are first-generation college students. If the researcher uses proportionate stratified random sampling to recruit a sample of 400 students, the final sample must include exactly _____ first-generation students.

In a psychology study aiming for a total sample size of $200$ participants, match each subgroup's overall population percentage to the number of respondents required to achieve proportionate stratified random sampling.

A variation of stratified sampling where the proportion of respondents in each subgroup perfectly matches their corresponding proportion in the overall population is called _____ stratified random sampling.

Order the steps a researcher must take to properly set up and execute a study using proportionate stratified random sampling.