Reconsider the previous exercise about haircut prices. Suppose that the instructor wants to test whether females in the population paid more on average for their most recent haircut than males. Which kind of test might be appropriate? (Circle all that apply.)

a. Simulation-based test comparing proportions
b. Simulation-based test comparing means
c. One-sided test
d. Two-sided test
e. z-test for single proportion
f. z-test for comparing two proportions
g. t-test for comparing means