Chapter 11: Q.34 (page 656)
State the hypotheses.
:
:
Short Answer
Smoking levels per day have no effect on self-reported ethnicity.
: The self-reported ethnicity is influenced by daily smoking levels.
Chapter 11: Q.34 (page 656)
State the hypotheses.
:
:
Smoking levels per day have no effect on self-reported ethnicity.
: The self-reported ethnicity is influenced by daily smoking levels.
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Get started for freeConsumers 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
An ice cream maker performs a nationwide survey about favorite flavors of ice cream in different geographic areas of the U.S. Based on the Table, do the numbers suggest that geographic location is independent of favorite ice cream flavors? Test at the significance level.
A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27
The actual distribution for a class of 20 is in table 11.28
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?
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