Smoking State Public Health Officials Claim That 18% of Adults

Essay

Smoking State public health officials claim that 18% of adults currently smoke cigarettes.
a. We start selecting a few adults at random, asking each if he or she is a smoker. Explain
why these can be considered Bernoulli trials.
b. How many people do you expect to have to ask in order to find a smoker?
c. Let X represent the number of smokers among a randomly chosen sample of 30 adults.
What is the probability model for X? Name the model (including its parameters) and
specify the mean and standard deviation of X.
d. What is the probability that there are at least 8 smokers among our sample of 30 people?