Key to Odd Numbered Unit S1 Exercises (How To Know What to Use)

(S1.1)
(A) The dependent variable (cholesterol level) is continuous. The samples are independent groups.
(B) The dependent variable (eye pressure) is continuous. The samples are paired.
(C) The dependent variable (birth weight) is continuous. The samples is independent, and the independent variable is continuous (gestational age).

(S1.3)
(A) The estimator, denoted phat (70%), estimates unknown population proportion p.
(B) The estimator, denoted m₁ - m₂ ($500), estimates unknown population median difference M₁ - M₂.
(C) The estimator phat (65%) estimates unknown population proportion p.