Binge drinking and gender. In a college population, students are classified by gender and whether or not they are frequent binge drinkers. Here are the probabilities:
|
|
Men
|
Women
|
|
Binge drinker
|
0.11
|
0.12
|
|
Not Binge drinker
|
0.32
|
0.45
|
(a) Verify that the sum of the probabilities is 1.
(b) What is the probability that a randomly selected student is not a binge drinker?
(c) What is the probability that a randomly selected male student is not a binge drinker?
(d) Explain why your answers to (b) and (c) are different. Use language that would be understood by someone who has not studied the material in this chapter.