In a population, 20% of people had a heart attack, 16% of people are current smokers, and 12% of people had a heart attack when smoking. Let event A be a person who is a current smoker and event B be a person who had a heart attack.
Please answer the following with full steps
a) Calculate P(A), P(B), P(AB) and P(AB), respectively.
b) If a person is randomly selected from current smokers, what is the probability that his person had a heart attack?
c) IF a person is randomly selected from current non-smokers, what is the probability that this person had a heart attack?
d) What is the risk of having a heart attack for current smokers? What is the risk of having a heart attack for current non-smokers?
e) What is the relative risk of having a heart attack for current smokers compared to current non-smokers? What about the relative risk if current non-smokers compared to current smokers?
f)What is the odds of having a heart attack among those who are current smokers? What is the odds of having a heart attack among those current non-smokers?
g) What is the odds ratio of having a heart attack for current smokers compared to current non-smokers? What about the odds ratio if current non-smokers compared to current smokers?