s2000exam1verb

# s2000exam1verb - COURSE: MSCI 3710 Exam 1 Version B Spring...

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COURSE: MSCI 3710 Print Name: Exam 1 Signature: Version B 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 = 246 Ha: l l 246 B. Ho: l l 246 Ha: l < 246 C. Ho: l = 250 Ha: l l 250 * D. Ho: l > 250 Ha: l l l 250 E. Ho: l = 250 Ha: l <250 2. The appropriate test statistic for testing the hypothesis as defined in question #1 is A. t because the sample size is small B. t because the sample standard deviation was calculated C. Z because the population standard deviation is known * D. Z because the sample variance was provided E. F because we do not know the equality of the variance 3. What is the calculated value of the test statistic? A. - 0.14 B. 1.82 C. 2.33 D. - 1.82 * E. - > 2.53 4. Assuming the calculated value of the test statistic is -2.00, what are the decision and conclusion of the test? A. Fail to reject the null hypothesis, conclude there is insufficient evidence the boards are too long or too short. * B. Fail to reject the null hypothesis, conclude there is overwhelming evidence the boards are not too long or too short. C. Fail to reject the null hypothesis, conclude there is evidence the boards are too long
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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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s2000exam1verb - COURSE: MSCI 3710 Exam 1 Version B Spring...

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