According to, the mean consumption of popcorn annually by Americans is 54 quarts. The marketing division of unleashes an aggressive campaign designed to get Americans to consume even more popcorn.
(a) Determine the null and alternative hypotheses that would be used to test the effectiveness of the marketing campaign.
(b) A sample of 800 Americans provides enough evidence to conclude that the marketing campaign was effective. Provide a statement that should be put out by the marketing department.
(c) Suppose, in fact, that the mean annual consumption of popcorn after the marketing campaign is 53.4 quarts. Has a Type I or Type II error been made by the marketing department? If they tested the hypothesis at the α = 0.05 level of significance, what is the probability of making a Type I error?

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