EBK STATISTICS FOR BUSINESS AND ECONOMI
13th Edition
ISBN: 8220103633567
Author: Sincich
Publisher: PEARSON
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Chapter 15.2, Problem 15.8ACB
Caffeine in Starbucks coffee. Researchers at the University of Florida College of Medicine investigated the level of caffeine in 16-ounce cups of Starbucks coffee (Journal of Analytical Toxicology, October 2003). In one phase of the experiment, cups of Starbucks Breakfast Blend (a mix of Latin American coffees) were purchased on 6 consecutive days from a single specialty coffee shop. The amount of caffeine 1n each of the six cups (measured in milligrams) is provided in the table.
| 564 | 498 | 259 | 303 | 300 | 307 |
- a. Suppose the scientists are interested in determining whether the
median amount of caffeine in Breakfast Blend coffee exceeds 300 milligrams. Set up the null and alternative hypotheses of interest. - b. How many of the cups in the sample have a caffeine content that exceeds 300 milligrams?
- c. Assuming p = .5, use the binomial table in Appendix 0 19 to find the
probability that at least four of the six cups have caffeine amounts that exceed 300 milligrams. - d. Based on the probability, part c, what do you conclude about H0 and Ha? (Use α = .05.)
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Chapter 15 Solutions
EBK STATISTICS FOR BUSINESS AND ECONOMI
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