Summer1Exam1VerA - COURSE MSCI 3710 Exam 1 Version A Summer...

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COURSE: MSCI 3710 PRINT Name: Exam 1 Signature: Version A Student ID#: Summer I 2002 Seat Number: Note: Whenever question(s) are connected you may be asked to assume a result (i.e., given a value as answer to a previous question); but this result (i.e., the given value) need not be the correct response for the previous question. This is done only to prevent you from losing points on a subsequent question because you made a mistake on one. Instructions: n Please PRINT your name, student ID#, and seat number on this exam. Also, put your signature on this exam. a Please PRINT your name, exam-version, and seat number on the Scantron . Also print your name on the backside of your Scantron . a You have 75 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. O Many of the questions follow the format of those in Adventures in Business Statistics. The remaining questions are either based on Excel outputs, or use an Adventures-like approach with problems similar to those assigned in the textbook. The chapter numbers given against in questions are only indicative, and you may need to integrate the concepts from other chapters. a Do not detach this exam. When you have completed the exam, please insert the Scantron into the exam booklet and return them both to your instructor. a No cheating. a Good luck and we wish you well on the exam.
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Use the paragraph below to answer the 5 questions that follow (Kvanli Chapter 8). The life span of an electronic chip used in a high-powered microcomputer is estimated to be 712.35 hours from a random sample of 40 chips. Historically, the life span of these electronic chips is known to be normally distributed with a population mean of 720 hours and variance of 400 hours 2 . Is there evidence that currently, the true mean life of the electronic chips differs from the usual 720 hours? Use a 10% significance level. 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: a = 712.35 Ha: a a712.35 B. Ho: a a 712.35 Ha: a < 712.35 C. Ho: a = 720 Ha: a a 720 * D. Ho: a > 720 Ha: a aa 720 E. Ho: a = 720 Ha: a <720 2. What is the calculated value of the test statistic? A. – 2.00 B. 0.12 C. 2.17 D. – 2.42 * E. – 0.765 3. If the computed value of the test statistic is 2.17, what is the p-value? 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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Summer1Exam1VerA - COURSE MSCI 3710 Exam 1 Version A Summer...

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