To score the AP Statistics Exams ETS hires Exam Readers, Table Leaders, and Other Leadership. Each reading room consists of 16 Exam Readers and 2 Table Leaders. There are 100 reading rooms. The 18 members of Other Leadership work together in a room. Required:
a. Describe how to select a stratified random sample of 36 people hired by ETS to score the AP Statistics Exams. Explain your choice of strata.
b. Describe how to select a cluster sample of 36 people hired by ETS to score the AP Statistics Exams. Explain your choice of clusters.
c. Explain a benefit of using a stratified random sample and a benefit of using a cluster random sample in this context