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s2000exam1verd - COURSE MSCI 3710 Exam 1 Version D Spring...

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COURSE: MSCI 3710 Print Name: Exam 1 Signature: Version D S.S.#: Spring 2000 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. Use the information given in the paragraph below to answer the next three questions. Instructions: n Please print your name, social security number, and seat number on this exam. Also, put your signature on this exam. l On your scantron PRINT your name, your version, and your seat number. To better protect your privacy also print your name on the back side of your scantron. l You have 50 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. l Many of the questions follow the format of those in Adventures in Business Statistics. The remaining questions are either based on the Excel assignment or use an Adventures-like approach with problems nearly identical to those assigned in the textbook. l When you have completed the exam, please insert your scantron into the exam booklet and turn them into your instructor. l No cheating. l Good luck and we wish you well on the exam. 1
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A lumber company is making boards that are specified to be 250 centimeters tall and a population variance of 169 centimeters. If the boards are too long they must be trimmed, and if they are too short they cannot be used. A sample of 35 boards is made, and it is found that they average 246 centimeters. Is there evidence at the 0.01 significance level that the boards are too short or too long? 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: l = 250 Ha: l <250 B. Ho: l = 250 Ha: l l g 250 * C. Ho: l > 250 Ha: l l l 250 D. Ho: l = 246 Ha: l l 246 E. Ho: l l 246 Ha: l < 246 2. The appropriate test statistic for testing the hypothesis as defined in question #1 is
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