Practice Test 4

Practice Test 4 - Bus Stat Practice Test 4 Multiple Choice...

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Bus Stat Practice Test 4 Multiple Choice Identify the choice that best completes the statement or answers the question. Exhibit 11-3 When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was obtained. Do you support Number of capital punishment? individuals Yes 40 No 60 No Opinion 50 We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed (hint: Goodness of fit). ____ 1. Refer to Exhibit 11-3. The calculated value for the test statistic equals a. 2 b. -2 c. 20 d. 4 Exhibit 11-4 Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification. Freshmen 83 Sophomores 68 Juniors 85 Seniors 64 We are interested in determining whether or not there has been a significant change in the proportions of classifications between the last school year and this school year. ____ 2. Refer to Exhibit 11-4. The calculated value for the test statistic equals ____ 3. Refer to Exhibit 11-4. The null hypothesis is 1

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Exhibit 11-5 In order to determine whether or not a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pills. The results of the study are shown below. Patients Cured Patients Not Cured Received medication 70 10 Received sugar pills 20 50 We are interested in determining whether or not the medication was effective in curing the common cold. ____ 4. Refer to Exhibit 11-5. The expected frequency of those who received medication and were cured is ____ 5. Refer to Exhibit 11-5. The test statistic is a. 10.08 b. 54.02 c. 1.96 d. 1.645 ____ 6. The degrees of freedom for a contingency table with 10 rows and 11 columns is Exhibit 11-6 In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have changed, a sample of 300 students was taken. Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College. ____
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