Unformatted text preview: 18. Suppose that the test statistic you calculated in the previous question was not greater than
the 5% critical value. What action would you recommend, and why?
a. Recalibrate the machine. The variance exceeds the speciﬁed maximum. b. Recalibrate the machine. If we had a larger sample size, we would reject the null
hypothesis. ’ c. Do not recalibrate the machine. The variance exceeds the speciﬁed maximum. d. Do not recalibrate the machine. There is not enough evidence that the machine
needs recalibration. e. There is not enough information to decide Whether or not to recalibrate the ma—
chine. Use the following information to answer the next 3 questions (19-21): Your friend claims that the fraction of male UIUC students who watched the Obama inau—
guration is greater than the fraction of female UIUC students who watched it. In order to
test her claim, you ask 200 randomly selected UIUC students whether or not they watched
the inauguration. Among the 110 male students (population 1) you asked, 83 watched the
inauguration. Among the 90 female students (population 2), 57 watched the inauguration. 19. What are the appropriate null and alternative hypotheses for testing your friend’s claim?
34- H01P1>P2VS- H11P1=P2 V b. H02p1>pgvs H1:p1§P2
c. H02P1=P2 VS- 171119175172
d..H0:p1=p2 vs. lep1<p2
e. H02p1=p2vs. H1:p1>p2 20. What is the value of the point estimate of the difference in the proportion of male and female
students 'who watched the inauguration? a. 0.055
e. 0.755 244 ...
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- Spring '08