IM3H SAMPLES FLASHCARDS

Simple Random Sample

Every group of n individuals has the same chance of being selected.

Exemplar of Simple Random Sample

Ms. Shultis randomly selects 5 students from her 42 student class.

Stratified Random Sample

Subjects are first divided into groups, strata, and then randomly selected from each group.

Exemplar of Stratified Random Sample

Split all CCA students into groups by grade (9th, 10th, 11th, 12th). Randomly select 20 students from each grade level.

Cluster Random Sample

Subjects are first divided into groups, clusters, and then randomly select one or more clusters, surveying every single person in the cluster.

Exemplar of Cluster Random Sample

Split up all CCA students into homerooms, randomly select 4 homerooms, and survey every single student in those 4 homerooms.

Systematic Random Sample

A random sample selected from a larger population at fixed periodic intervals.

Exemplar of Systematic Random Sample

Selecting every 15th person on a list of the population to imitate the benefits of simple random sampling.

Convenience Sample

Sample from a population that is easy or convenient.

Exemplar of Convenience Sample

Ms. Shultis surveys her 1st period class to find out if CCA students like having homework.

Volunteer Sample

Sample from a population of volunteers.

Exemplar of Volunteer Sample

Sam stands at the front of the school asking students to fill out his survey about anime.