Samuel is researching the extracurricular activities that all of the teachers at his school participated in when they were in school. He interviewed a number of teachers for each subject in the school that was proportional to the total number of teachers in the school for that subject. Which of the following is not true?

Question

gabylovesyou · Answer

A. The teachers in his grade are the sample.
B. Each teacher that he interviewed is a unit in the study.
C. He used stratified sampling.
D. The population is all teachers in his school.

campbell_st · Answer

he used a stratified sample... he grouped the teachers by subject... and took a proportion of the teachers in each subject to get the sample....

campbell_st · Answer

oops... the not true is A.... as the teachers are from the whole school population and there is no information to indicate he only selected from his grade..

gabylovesyou · Answer

ohh so the answer is A :D

gabylovesyou · Answer

Right?