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A company that produces laundry detergent is interested in the level of consumer awareness concerning the unique properties of their product. Historical data indicated that
A company that produces laundry detergent is interested in the level of consumer awareness concerning the unique properties of their product. Historical data indicated that among the consumers who buy this detergent, the proportion who purchased it because they had seen it advertised on TV is 0.80. The marketing manager feels that increases in the TV advertising budget over the years have caused an increase in sales. She decides to conduct a survey to determine if there is sufcient evidence to conclude that the population proportion is greater than 0.80. In a random sample of 400 consumers who bought this detergent, 336 indicated that they bought it because they saw it advertised on TV. What is the value of the test statistic for the test described above and what is the type of alternative hypothesis? 0 a. 2.18, two-tailed O b. 2.00, left-tailed O c. -2.00, right-tailed Q d. 2.00, right-tailed C) e. -2.00, left-tailed
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