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Chapter 11: Q.63 (page 658)
State the null and alternative hypotheses?
The null hypothesis is .
The alternative hypothesis is .
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What is the p-value?
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 car manufacturers are interested in whether there is a relationship between the size of the car an individual drives and the number of people in the driver’s family (that is, whether car size and family size are independent).To test this, suppose that car owners were randomly surveyed with the results in Table . Conduct a test of independence.
| Family Size | Sub & Compact | Mid-size | Full-size | Van & Truck |
Table 11.44
You want to buy a specific computer. A sales representative of the manufacturer claims that retail stores sell this computer at an average price of with a very narrow standard deviation of . You find a website that has a price comparison for the same computer at a series of stores as follows: . Can you argue that pricing has a larger standard deviation than claimed by the manufacturer? Use the significance level. As a potential buyer, what would be the practical conclusion from your analysis?
H0: __________
Is the traveler disputing the claim about the average or about the variance?
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