Chapter 11: Q.29 (page 656)
How many passengers are expected to travel between and miles and purchase first-class tickets?
Short Answer
First-class tickets will cost around for customers traveling between and miles.
Chapter 11: Q.29 (page 656)
How many passengers are expected to travel between and miles and purchase first-class tickets?
First-class tickets will cost around for customers traveling between and miles.
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The Bureau of Labor Statistics gathers data about employment in the United States. A sample is taken to calculate the number of U.S. citizens working in one of several industry sectors over time. Table 11.17 shows the results:
We want to know if the change in the number of jobs is independent of the change in years. State the null and alternative hypotheses and the degrees of freedom .
Consumers may be interested in whether the cost of a particular calculator varies from store to store. Based on surveying stores, which yielded a sample mean of and a sample standard deviation of , test the claim that the standard deviation is greater than .
Use a solution sheet to solve the hypothesis test problem. Go to Appendix E for the chi-square solution sheet. Round expected frequency to two decimal places.
A recent debate about where in the United States skiers believe the skiing is best prompted the following survey. Test to see if the best ski area is independent of the level of the skier.
U.S. Ski Area | Beginner | Intermediate | Advanced |
Tahoe | |||
Utah | |||
Colorado |
Table
In 2007, the United States had 1.5 million homeschooled students, according to the U.S. National Center for Education Statistics. In Table 11.56 you can see that parents decide to homeschool their children for different reasons, and some reasons are ranked by parents as more important than others. According to the survey results shown in the table, is the distribution of applicable reasons the same as the distribution of the most important reason? Provide your assessment at the
5% significance level. Did you expect the result you obtained?
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