identify the kind of sample that is described. the superintendent of a large school district wants to test the effectiveness of
a new program designed to improve reading skills among elementary school children. there are elementary schools in the district. the superintendent chooses a simple random sample of five schools, and institutes the new reading program in those schools. a total of children attend these five schools.
The sample used in this problem is classified as cluster.
<h3>How are samples classified?</h3>
Samples may be classified as:
Convenient: Drawn from a conveniently available pool.
Random: All the options into a hat and drawn some of them.
Systematic: Every kth element is taken.
Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.
Stratified: Also divides the population into groups. Then, a equal proportion of each group is surveyed.
For this problem, a group of schools is selected, and then the new program is applied to all students in these school, meaning that all elements in the cluster are surveyed, so cluster sampling is used.
