The accompanying data are from the article Characteristics of Buyers of Hybrid Honda Civic IMA: Preferences, Decision

Question:

The accompanying data are from the article €œCharacteristics of Buyers of Hybrid Honda Civic IMA: Preferences, Decision Process, Vehicle Ownership, and Willingness to Pay€ (Institute for Environmental Decisions, November 2006). Each of 311 people who purchased a Honda Civic was classified according to sex and whether or not the car purchased had a hybrid engine.

Suppose one of these 311 individuals is to be selected at random.
a. What is the probability that the selected individual purchased a hybrid?
b. What is the probability that the selected individual is male?
c. What is the probability that the selected individual is male and purchased a hybrid?
d. What is the probability that the selected individual is female or purchased a hybrid?
e. What is the probability that the selected individual is female and purchased a hybrid?
f. Explain why the probabilities computed in Parts (d) and (e) are not equal.