f98exm2c - COURSE: MSCI 3710 EXAM 2 Version C SEMESTER:...

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COURSE: MSCI 3710 Print Name: EXAM 2 Signature: Version C S.S.#: SEMESTER: Fall 1998 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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Case I: Use the information given in the paragraph below to answer the next four questions. An auto parts manufacturing plant is studying what is required for them to go to just in time (JIT) manufacturing. The plant manager of the shop is concerned with the length of time that it takes to obtain special-orders from their suppliers. The number of days it takes to special-order a part is recorded for 15 randomly selected orders from each of three suppliers, as shown in the following table. A B C 15 7 10 17 12 11 14 8 18 10 15 19 9 6 9 13 11 13 18 12 20 11 10 13 12 8 15 18 14 13 16 10 18 13 6 13 13 9 9 14 13 7 16 11 16 The manager uses the data to test the claim, at the .05 significance level, that there is a difference in the mean times that it takes for suppliers to deliver parts. The results of the ANOVA are shown in the partially filled table below. SUMMARY Groups Count Sum Average Variance A 15 209.0 13.93 7.638 B 15 152.0 10.13 7.838 C 15 204.0 13.60 15.97
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ANOVA Source of Variation SS df MS F P-value F crit Between Groups 2 66.42 0.0043 Within Groups 440.27 42 10.48 Total 573.11 44 1. Which of the following is the correct alternative hypothesis? A. Ha: the mean time to deliver orders is the same for all three suppliers. B. Ha: the mean time to deliver orders is not the same for all three suppliers. C. Ha: the mean time to deliver orders from each supplier is different from the others. D. Ha: the mean time to deliver orders is most different for supplier C. E. Ha: the mean time to deliver orders is the same among blocks of time. 2.
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f98exm2c - COURSE: MSCI 3710 EXAM 2 Version C SEMESTER:...

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