Monday, May 24, 2010

Stratify random sample?

a principle wants to survey the student body about the convenience and security of the student parking lot. the statistics teacher recommended a stratified samole, but the got interrupted before he could explain what that meant. decide what factor the principal should use to stratify and explain how the principal could produce a stratified sample with 100 students.

Stratify random sample?
the principle could stratify by grade, by gender, or anything. Then, divide 100 by the number of categories (for example, there are 4 grades in high school), so you would get 25 people in each category to add up to 100.

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