In: Statistics and Probability
In a random sample of 100 viewers, 72% had a favourable impression of a new TV ad campaign.
(a) Test the hypothesis that fewer than 80% of the population of
all viewers have a favourable view of the ad campaign. Use the .05
level of significance. Explain your conclusion.
(b) Construct a 95% confidence interval for the proportion of the
population of all viewers who have a favourable view of the ad
campaign. Interpret your results.