Question

To measure achievement of third grade students, a school system randomly selects four third grade classes and tests all children in those classes. This is an example of what type of sampling?

a. systematic
b. stratified
c. cluster
d. convenience

Answer 1

Cluster sampling is used in this scenario, where the school system randomly selects four third grade classes and tests all the children in those classes.

Step-by-step explanation:

The type of sampling used in this scenario is cluster sampling.

Cluster sampling involves dividing the population into clusters and then randomly selecting some clusters to include in the sample. In this case, the school system randomly selects four third grade classes and tests all the children in those classes. Each class represents a cluster, and all the students in the selected classes are included in the sample. This method allows for testing a specific group (third grade students) within the larger population.

Answer 2

Cluster

Step-by-step explanation:

When observations from a large population are divided into groups, such that subjects in each of these groups are similar to one another than those in the other groups. These individual groups of observation are called clusters. In the scenario above, the random group of 4 third grade classes selected represent of cluster or group since all the subjects belong to the class grade which is to be measured and all subjects belonging to the selected cluster or group are to be measured.