Comparing Computer Results. Refer to the Minitab display below. The probabilities were obtained by entering the values of n=6 and p = 0.0167. In a clinical test of the drug Lipitor, 16.7% of the subjects treated with 10 mg of atorvastatin experienced headaches (based on data from Parke-Davis). In each case, assume that 6 subjects are randomly selected and treated with 10 mg of atorvastatin, then find the indicated probability.

Binomial with n = 6 and p = 0.167000

x (P(X=x)

0 0.3341

1 0.4019

2 0.2014

3 0.0538

4 0.0081

5 0.0006

6 0

Find the probability that at least five of the subjects experience headaches. Is it unusual to have at least five of six subjects experience headaches? The textbook answer for this one is 0.0006, yes. I just can't figure it out.

Find the probability that at least one subject experiences headaches. Is it unusual to have at least one of six subjects experience headaches? [Hint: P(at least 1) = 1 - P(0)]