3710FinalvA.Sp09

3710FinalvA.Sp09 - COURSE: DSCI 3710 Final Exam: Version A...

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COURSE: DSCI 3710 Print Name: Final Exam: Version A Signature: SEMESTER: Spring 2009 Student ID #: 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. Instructions: Please print your name and student ID on this exam. Also, put your signature on this exam. On your scantron PRINT your name, your version, and your section number. To better protect your privacy also print your name on the backside of your scantron. You have 105 minutes to complete this exam. The exam is open book, open notes, and open mind. You may use any type of calculator but please show all your work on the exam and mark all answers on the scantron. Many of the questions follow the format of those in Hawkes Learning Systems Business Statistics (HLS). The remaining questions are either based on the Excel assignment or use an HLSBS -like approach with problems nearly identical to those assigned in the textbook. When you have completed the exam, please insert your scantron into the exam booklet and turn them in to your instructor. No cheating. Good luck and we wish you well on the exam.
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Use the following information to answer the next five questions The manager of Hybrid Motors wishes to determine if the true mean productivity of employees at its Detroit plant is any different from that at its Mexico City plant (by measuring number of cars that one employee assembles per day). Random samples of employees in Detroit and Mexico City are selected, and the productivity scores at each assembly plant are recorded. The following results are obtained. Detroit Mexico 56.2 51.5 42.7 64.3 43.4 53.5 54.6 44.3 51.2 54.5 XX XX XX XX XX t-Test: Two-Sample Assuming Equal Variances Detroit Mexico Mean 51.925 53.271429 Variance 32.98785 7 34.935714 Observations 8 7 Pooled Variance 33.88686 8 Hypothesized Mean Difference 0 df 13 t Stat -0.446906 P(T<=t) one-tail XXXXX t Critical one-tail 1.770933 4 P(T<=t) two-tail XXXXX t Critical two-tail 2.160368 7 1. The critical value of the appropriate test statistic to conduct the test of hypothesis for the belief that there is a difference in the mean productivity is: A. -0.4469 B. 2.65 C. 2.16* D. 1.77 E. 0.662 2. The calculated value of the appropriate test statistic to conduct the test of hypothesis for the belief that there is a difference in the mean productivity is:
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A. -0.4469* B. 2.65 C. 2.16 D. 1.77 E. 0.662 3. Which of the following ranges best describes the p-value for the test statistic to conduct the test of hypothesis for the belief that there is a difference in the mean productivity?
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This note was uploaded on 04/10/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

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3710FinalvA.Sp09 - COURSE: DSCI 3710 Final Exam: Version A...

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