Question

a principal designs a survey to determine whether students want to expand the school library or add a new score board in the gym. he surveys every third student who enters the library. which change would improve the sample by providing data that is less likely to be biased? survey every third student who enters the band room survey every third student who enters the cafeteria survey every third student who enters the basketball game survey every third student who enters the theater room

Explanation:

The original sample (surveying library - goers) is biased as library users may favor the library expansion. The band room, basketball game, and theater room also have biased populations (e.g., band students, sports fans, theater - goers). The cafeteria is a place where a more diverse group of students (from all interests/backgrounds) are likely to be found, so surveying every third student entering the cafeteria gives a more representative, less - biased sample.

Answer:

B. survey every third student who enters the cafeteria