A researcher wonders if students at private schools participate in extracurricular activities as often as students do at public schools. They want to sample students and perform a two-sample test to see if the proportion of students who participate in extracurricular activities is significantly different between the two types of schools.
Which of the following are conditions for this type of test?
Choose all answers that apply:
(Choice A) The expected counts of students participating and not participating in both samples are all at least
(Choice B) The students within each sample are independent, and the samples are independent of each other.
(Choice C) They sample at least 30 students from each school.