sp98ex1d

# sp98ex1d - MSCI 3710 Time allowed: 45-50 minutes. Sample...

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MSCI 3710 Sample Exam Spring ‘98 Time allowed: 45-50 minutes. Note: Whenever a question is connected to a preceding question(s) you may be required to assume a result from the preceding question that may or may not be correct. This is to prevent you from losing points on the following question because you made a mistake on the preceding question. The next four questions are related The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so they need to find out the fraction of people who appear on the list that are actually caught. They believe the fraction to be greater than .32. A sample of 995 suspected criminals is drawn. Of these people, 348 were captured. Is there sufficient evidence, at the .01 significance level, to substantiate the FBI’s belief? 1. What is the calculated value of the test statistic? A. .3497 B. .0927 C. .0148 D. 1.96 E. 2.008* 2. Suppose the calculated value of the test statistic were 1.96. What would be the decision and conclusion concerning the hypothesis test to support the FBI’s belief? A. Fail to reject Ho, conclude there is evidence to support the FBI’s belief. B. Fail to reject Ho, conclude there is insufficient evidence to support the FBI’s belief.* C. Reject Ho, conclude there is evidence to support the FBI’s belief. D. Reject Ho, conclude there is insufficient evidence to support the FBI’s belief. E. Reject Ho, conclude there is very strong evidence not to support the FBI’s belief. 3. Suppose the calculated value of the test statistic were 2.008. What would be the observed level of significance (p-value)? A. .4778 B. .0222* C. .0100 D. 2.008 E. 1.96 4. Suppose the FBI repeats the sampling in the following year to compare the effectiveness of the 10 Most Wanted list over time. If they sample 1000 suspected criminals on the list and 400

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of these are actually caught, what would be the absolute value of the calculated test statistic to test the claim that a larger proportion are caught in the second year compared to the first? A.
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## This note was uploaded on 03/09/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

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sp98ex1d - MSCI 3710 Time allowed: 45-50 minutes. Sample...

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