A December 2011 FOX News poll asked, “Which of the following comes closest to your view about what government policy should be toward illegal immigrants currently in the United States?” The three options were (A) Send all illegal immigrants back to their home country, (B) Have a guest worker program that allows immigrants to remain in the United States to work but only for a limited amount of time, and (C) Allow illegal immigrants to remain in the country and eventually qualify for U.S. citizenship, but only if they meet certain requirements, such as paying back taxes, learning English, and passing a background check. The following table lists the party affiliations of the respondents and their responses. The numbers in the table are approximately the same as reported in percentages in the poll.
Test at a 5% significance level whether the distributions of responses are significantly different for at least two of the political affiliations.
Answer to relevant QuestionsThe following table gives the distributions of grades for three professors for a few randomly selected classes that each of them taught during the last 2 years. Using a 2.5% significance level, test the null hypothesis that ...A sample of 22 observations selected from a normally distributed population produced a sample variance of 18. a. Write the null and alternative hypotheses to test whether the population variance is different from 14. b. ...The manufacturer of a certain brand of light bulbs claims that the variance of the lives of these bulbs is 4200 square hours. A consumer agency took a random sample of 25 such bulbs and tested them. The variance of the lives ...All shoplifting cases in the town of Seven Falls are randomly assigned to either Judge Stark or Judge Rivera. A citizens group wants to know whether either of the two judges is more likely to sentence the offenders to jail ...Refer to Exercise 11.62a. Test at a 5% significance level if the population variance is different from 6.5. n = 21, s2 = 9.2
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