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Chapter 11: Q.25 (page 655)
A marathon runner is interested in the relationship between the brand of shoes runners wear and their run times. Sh
The given statement is a test of independence.
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The mean and the median of the chi-square distribution are the same if .
Let
Decision: ________
Conclusion (write out in a complete sentence.): ________
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 .
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?
Read the statement and decide whether it is true or false:
In a goodness-of-fit test, the expected values are the values we would expect if the null hypothesis were true.
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