Question: The drug Zyban is meant to create the urge to quit smoking. In clinical trials, 35% of the study’s participants experienced insomnia when taking 300 mg of Zyban per day.

For a random sample of 50 users of Zyban, answer the following questions?

a) What is the expected number of users who experience insomnia? What is the standard deviation?

b) What is the probability that exactly 16 users experience insomnia?

c) What is the probability that at most 12 will experience insomnia?

d) What is the probability that at least 12 will experience insomnia?