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A survey is conducted that includes several hundred students at a large university, all taking an introductory statistics course. Proportions of students in the various year and gender categories are typical of those for college students in general.

a. Suppose we are interested in whether or not individuals are left-handed. Which of these is the largest population for which we can say the surveyed students probably constitute a representative sample: all humans, all college students, or all students at that university?

b. Suppose we are interested in males' earnings for the past year. Which of these is the largest population for which we can say the surveyed male students probably constitute a representative sample: all males, all college-aged males, all male college students, or all male students at that university?

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