3710Fall05finalA

3710Fall05finalA - COURSE: DSCI 3710 Print Name: Final...

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Please print your name, Student ID number, and seat number on this exam. Also, put your signature on this exam. l Please PRINT your name and your Student ID number, and the above Exam. Version on your scantron. To better protect your privacy also print your name on the back side of your scantron. l The exam has 30 questions, and you have 100 minutes to complete it. The exam is open book, open notes, and open mind. You may use any type of calculator, but please show all your work on this exam and properly mark all answers on the scantron . l Many of the questions follow the format of those in HLS modules. Others are either based on the Excel assignments done for the course, or use an HLS -like approach with problems similar to those assigned as homework from the text. l Please DO NOT DETACH this exam. When you have completed the exam, please insert completed scantron into the exam booklet and turn them (both) in to your instructor, at the front desk. l No cheating. l Good luck and we wish you well on the exam. COURSE: DSCI 3710 Print Name: Final Exam: Version A Signature: Fall 2005 S.I.D.#: 1 Instructions:
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Note: Whenever question(s) are connected you may be asked to assume a result (given a value) for some previous question/s; but this result may or may not be correct. The process is to prevent you from losing points on subsequent question/s because you made a mistake on some previous question/s. 2
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Use the information given below to answer the four (4) questions that follow: A quality engineer wants to verify that the thickness of metal strips produced in their rolling mills is 6 centimeters. The consistency of their thickness is very important to the companies purchasing these strips, for down-stream processing. The engineer drew a sample of 70 strips, and obtained the average sample thickness as 5.835, and the sample standard deviation as 1.23. Test the appropriate hypothesis at the 1% significance level. 1. What is the calculated value of the test statistic? A. .−0.165 B. –0.1342 C. 2.36 D. 1.01 E. – 1.12 * 2. At the 1% level of significance, where is the Reject Ho region? A. To the left of Z = -1.282 and to the right of Z = 1.282 B. To the left of Z = -1.645 and to the right of Z = 1.645 C. To the left of t = -1.328 and to the right of t = 1.328 D. To the right of Z = -2.576 and to the left of Z = 2.576 E. To the left of Z = -2.576 and to the right of Z = 2.576* 3. Assuming the calculated value of the test statistic is 3.00, what are the decision and conclusion of the test at the significance level of 0.01 ? A. Fail to reject the null hypothesis, conclude there is insufficient evidence that the thickness of the metal strips is not 6 centimeters. B. Reject the null hypothesis, conclude there is evidence that the thickness of the metal
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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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3710Fall05finalA - COURSE: DSCI 3710 Print Name: Final...

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