The table summarizes data on smoking status and perceived risk of smoking and is consistent with summary quantities obtained in a Gallup Poll conducted in November 2002. Assume that it is reasonable to consider these data as representative of the U.S. adult population.
|
Perceived Risk |
| Smoking Status |
Very Harmful |
Somewhat Harmful |
Not Too Harmful |
Not at All Harmful |
| Current Smoker |
59 |
34 |
5 |
1 |
| Former Smoker |
80 |
18 |
3 |
2 |
| Never Smoked |
83 |
11 |
2 |
1 |
(c) What is the probability that a randomly selected U.S. adult views smoking as very harmful given that the selected individual is a current smoker? (Give the answer to four decimals places.)
(d) What is the probability that a randomly selected U.S. adult views smoking as very harmful given that the selected individual is a former smoker? (Give the answer to four decimals places.)
(e) What is the probability that a randomly selected U.S. adult views smoking as very harmful given that the selected individual never smoked? (Give the answer to four decimals places.)