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3710FinalvA.Sp09

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

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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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• Spring '08
• Dr.Jay
• Statistics, Statistical hypothesis testing, insufficient evidence, Nutty Bar, HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH, KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK

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

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