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In a random sample of 100 viewers, 72% had a favourable impression of a new TV...

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

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Math   Statistics-And-Probability   
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