Unformatted text preview: 8. In testing the null hypothesis H0 : p = 0.7 versus the alternative H1 : p < 0.7 you obtain a
test statistic of z = —2.37. Which of the following areas represents the p—value of the test? Use the following information to answer the next 3 questions (9—11): « The Career Center at UIUC is interested in comparing the time hunting for jobs after gradu-
ation for students who speak two or more languages and those who speak only English. For
a random sample of 70 students who speak two or more languages (population 1), the office
found the average“ job hunting time after graduation as 1.9 months. For an independent
random sample of 120 students who only speak English (population 2), the average time is
2.7 months. Previous studies indicate that the standard deviation is 1.1 months for popula—
tion 1, and 1.7 months for population 2. The Career Center believes that students who only
speak English will spend longer looking for a job after graduation compared to students who
speak two or more languages. 9. What are the appropriate null and alternative hypotheses for the Career Centers belief?
a. Hold—il—ff'2=OVS. H11i1—i'zaé0 13- H03H1—#2=0VS‘H11#1—H27é0
d. H02u1—u220vs.H1:n1——pg>0 e. Hoii‘l—i‘2=0VS. H125‘1—5Z‘2>0 240 ...
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- Spring '08