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Chapter 11: Q. 4 (page 734)
Assuming is true, the expected number of Hispanic drivers who would receive a ticket is
(a) 8
(c) 11.
(e) 12.
(b) 10.36
(d) 11.84
(d) 11.84
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Which hypotheses would be appropriate for performing a chi-square test?
(a) The null hypothesis is that the closer students get to graduation, the less likely they are to be opposed to tuition increases. The alternative is that how close students are to graduation makes no difference in their opinion.
(b) The null hypothesis is that the mean number of students who are strongly opposed is the same for each of the four years. The alternative is that the mean is different for at least two of the four years.
(c) The null hypothesis is that the distribution of student opinion about the proposed tuition increase is the same for each of the four years at this university. The alternative is that the distribution is different for at least two of the four years.
(d) The null hypothesis is that year in school and student opinion about the tuition increase in the sample are independent. The alternative is that these variables are dependent.
(e) The null hypothesis is that there is an association between a year in school and opinion about the tuition increase at this university. The alternative hypothesis is that these variables are not associated.
Calculate the expected count for each color, assuming that the company鈥檚 claim is true. Show your work.
The degrees of freedom for the chi-square test for this two-way table are (a) .
(b) .
(c) .
(d) .
(e) None of these.
T11.5. We compute the value of thestatistic to be . Assuming that the conditions for inference are met, the P-value of our test is
(a) greater than
(b) between and .
(c) between and .
(d) between and
(e) less than
No chi-squareThe principal in Exercise also asked the random sample of students to record whether they did all of the homework that was assigned on each of the 铿乿e school days that week. Here are the data:
Explain carefully why it would not be appropriate to perform a chi-square goodness-of-铿乼 test using these data.
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