A statistics teacher has 4 periods of introductory statistics. She wants to get students’ opinions o

Janessa Olson

Janessa Olson

Answered question

2022-07-03

A statistics teacher has 4 periods of introductory statistics. She wants to get students’ opinions on a new homework policy. To get a sample, the teacher groups the students by their class performance (A students, B students, etc.). Then she randomly selects 3 students from each class performance group to survey. Which sampling method was used?
- cluster sampling
- simple random sampling
- stratified random sampling
- systematic random sampling

Answer & Explanation

Danika Rojas

Danika Rojas

Beginner2022-07-04Added 9 answers

In stratified sampling, the population is divided in such a way that it is homogeneous within the stratum and heterogeneous between the strata. The simple random sampling is then applied within each stratum.
In this case, the teacher divided the students into groups by their class performance (A students, B students, etc.) and then randomly selects 3 students from each group. This case can be considered as a case of stratified random sampling because the researcher randomly selects students from their respective groups.
The correct option is:
- stratified random sampling

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