Vaccine For a specific group of subjects, there is a 5% chance of influenza (“flu”). When 80 subjects were treated with a vaccine, only one of them presented with influenza.

a. Use the range rule of thumb to identify the limits separating values that are significantly low and those that are significantly high. Based on the results, is the result of one subject getting influenza either significantly low or significantly high?

b. Find the probability of exactly one subject experiencing influenza, assuming that the vaccine has no effect.

c. Find the probability of one or fewer subjects experiencing influenza, assuming that the vaccine has no effect.

d. Which probability is relevant for determining whether one subject experiencing influenza is significantly low: the probability from part

(b) or part (c)? Based on the relevant probability, is the result of one subject experiencing influenza significantly low?

e. What do the results suggest about the effectiveness of the vaccine?