Who else isn't allowed to have summer break please tell me im not the only one

For a study comparing leisure activities of physical education students with those of other students, a researcher has randomly selected a ten percent sample of physical education students and one percent sample of non-physical education students for a list of students. what kind of sampling technique is this?

Why does the author attempt to convince the reader that what he has described of the middle colonies is factual?

Drop in child care facilities are required to be licensed