SuIIE1_A - COURSE: MSCI 3710 EXAM 1 Version A Print Name:...

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COURSE: MSCI 3710 Print Name: EXAM 1 Signature: Version A S.S.#: SEMESTER: Summer II 1999 Seat Number: Note: Whenever question(s) are connected you may be asked to assume a result (given a value) from the previous question but this result may or may not be correct. This is to prevent you from losing points on a second question because you made a mistake on a previous question.
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Use the information given in the following paragraph to answer the next eight questions. Your company has recently purchased 167 new automobiles for your salesmen. Part of the reason you selected these cars was because of the gas milage and large tanks; the cars were advertised to get 430 miles from a full tank of gas. You believe that these cars are not getting this amount. You had your salespeople track the milage on their cars, and learned the following: Sample mean: 421 miles per tank Sample Standard deviation: 10.7 1. What kind of test would be most appropriate for this data to test your belief? A. Analysis of Variance for Single Sample B. T-Test for Population Mean C. Z-Test for Population Mean * D. Paired T-Test E. Hypothesis test for Population Proportion 2. What is the best set of hypothesis for testing your belief? A. Ho: μ < 421 Ha: μ > 421 B. Ho: μ < 430 Ha: μ > 430 C. Ho: μ < 430 Ha: μ > 430 D. Ho: μ > 430 Ha: μ < 430 * E. Ho: μ > 421 Ha: μ < 421 3. What is the calculated value of the test statistic for this data? A. -9 B. 421 C. -140.467 D. -.8411 E. -10.87 * 4. Assume that the calculated value of the test statistic is -1.84 and that this is a one-tailed test. To what p-value does this correspond? A. .4671 B. .2289 C. .0329 * D. -.4671 E. -.0529 5. Assume that the p-value is .087 and the significance level was 10% for this one-tailed test. What would you conclude? A. Conclude that there is evidence that the cars get less than 430 miles per tank on average
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because the p-value is below the level of significance. * B. Conclude that there is evidence that the cars get less that 430 miles per tank on average because the mean of 421 is less than the advertised level of 430. C. Conclude that there is insufficient evidence that the cars get less than 430 miles per tank on average because the difference between the mean and advertised level is less than the standard deviation. D. Conclude that there is insufficient evidence that the cars get less than 430 miles per tank on average because the p-value is below the level of significance. E. There is not enough information to draw a conclusion. 6. Assume that you determine the number of miles per tank, on average, is less than the advertised level (at the 10% level of significance) and demand compensation. If you then learn that the advertised level is only valid with Super Premium gasoline (and you have not been using that), what have you most likely done? 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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SuIIE1_A - COURSE: MSCI 3710 EXAM 1 Version A Print Name:...

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