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Chapter 11: Q.68 (page 658)
What can you conclude at the significance level ?
We cannot reject the null hypothesis. There is enough evidence to conclude that the standard deviation is greater than .
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Is the traveler disputing the claim about the average or about the variance?
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?
A sample of students is taken. Of the students surveyed,were music students, while were not. Ninetyseven were on the honor roll, while were not. If we assume being a music student and being on the honor roll are independent events, what is the expected number of music students who are also on the honor roll?
Conduct a goodness-of-fit test to determine if the actual college majors of graduating males fit the distribution of their expected majors.
Read the statement and decide whether it is true or false.
The test for independence uses tables of observed and expected data values.
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