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Chapter 11: Q 3. (page 716)
P-values For each of the following, find the value using Table Then
calculate a more precise value using technology.
a.
b.
Part (a) value
Part (b) value
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Last python Refer to Exercises 28 and 30.
a. Verify that the conditions for inference are met.
b. Use Table C to find the P-value. Then use your calculator鈥檚 蠂2 cdf command.
c. Interpret the P-value from the calculator.
d. What conclusion would you draw using 伪=0.10?
What鈥檚 your sign? The University of Chicago鈥檚 General Social Survey (GSS) is the nation鈥檚 most important social science sample survey. For reasons known only to social scientists, the GSS regularly asks a random sample of people their astrological sign. Here are the counts of responses from a recent GSS of people:
If births are spread uniformly across the year, we expect all signs to be equally likely. Do these data provide convincing evidence at the significance level that all signs are not equally likely?
Regulating guns The National Gun Policy Survey asked a random sample of adults, "Do you think there should be a law that would ban possession of handguns except for the police and other authorized persons?" Here are the responses, broken down by the respondent's level of education:
Do these data provide convincing evidence at the level of an association between education level and opinion about a handgun ban in the adult population?
Which of the following is the correct number of degrees of freedom for the chi-square test using these data?
a.
b.
c.
d.
e.
Inference recap (to ) In each of the following settings, state which inference procedure from Chapter you would use. Be specific. For example, you might answer, 鈥淭wo-sample z test for the difference between two proportions.鈥� You do not have to carry out any procedures.
a. What is the average voter turnout during an election? A random sample of cities was asked to report the percent of registered voters who voted in the most recent election.
b. Are blondes more likely to have a boyfriend than the rest of the single world? Independent random samples of blondes and nonblondes were asked whether they have a boyfriend.
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