Question

Mrs. Liang, the librarian, wants to compare the numbers of patrons who prefer e-books to paperback books. She decides to take a poll of every third adult with a child who arrives at the library for one of the four reading groups: toddlers, preschoolers, primary grades, and upper elementary. Which statement is true about her method of data collection?
A) It is not balanced because it is less likely to include teens, young adults, and senior citizens in the patron population
B) It is balanced because she is polling four different reading groups, which include all types of people

Answer 1

The appropriate description is A).

Mrs. Liang will be sampling the patron population with children who use reading groups. Unless that is the entire patron population, which we suspect it is not, her sampling method will be unrepresentative of the patron population as a whole.