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Chapter 11: Q. 94 (page 665)
Read the statement and decide whether it is true or false.
The number of degrees of freedom for a test of independence is equal to the sample size minus one.
The statement is false.
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Transit Railroads is interested in the relationship between travel distance and the ticket class purchased. A random sample of passengers is taken. Table 11.31 shows the results. The railroad wants to know if a passenger鈥檚 choice in ticket class is independent of the distance they must travel.
State the hypothesis:
:
:
Graph the situation. Label and scale the horizontal axis. Mark the mean and test statistic. Shade in the region corresponding to the p-value.
Conduct a goodness-of-fit test to determine if the actual college majors of graduating males fit the distribution of their expected majors.
The owner of a baseball team is interested in the relationship between player salaries and team winning percentage. He takes a random sample of players from different organizations.
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 College students may be interested in whether or not their majors have any effect on starting-salaries after graduation. Suppose that recent graduates were surveyed as to their majors in college and their starting salaries after graduation. Table shows the data. Conduct a test of independence.
| Major | |||
| English | |||
| Engineering | |||
| Nursing | |||
| Business | |||
| Psychology |
Table
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