3710Exam1SummerII_2005 - COURSE: MSCI 3710 Exam 1 Summer II...

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1 COURSE: MSCI 3710 Print Name: Exam 1 Signature: Summer II 2005 Student ID#: INSTRUCTIONS: Please print your name and student ID number on this exam. Also, put your signature on this exam. On your scantron PRINT your name and exam version. To better protect your privacy also print your name on the backside of your scantron. You have 100 minutes to complete this exam. This exam contains 30 questions. The exam is open book, open notes, and open mind. You may use any type of hand calculator but please show all your work on the exam and mark all answers on the scantron. Usage of cell phones, digital cameras, PDAs, and other communication devices is strictly prohibited. Many of the questions follow the format of those in Hawkes Learning Systems Business Statistics. The remaining questions are either based on the Excel assignments or use an HLSBS-like approach with problems nearly identical to those assigned in the textbook. Please DO NOT pull this exam apart. When you have completed the exam, please turn your scantron and exam booklet into your instructor, at the front desk. No cheating. Good luck and we wish you well on the exam. Note: At times, when question(s) are connected you may be asked to assume a result (given a value) as an answer for the previous question but this result (value) may or may not be correct. The procedure is set in place to prevent you from losing points on a subsequent question because you made a mistake on some previous question/s.
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2 Use the information given in the paragraph below to answer the next four questions. An automobile manufacturer claims their car has a rating of 35 miles/gallon (mpg). An independent testing firm has been contracted to test the mpg of the car. They tested 24 vehicles and analyzed the data in Excel as shown below. Is there sufficient evidence, at the 0.05 significance level, that the cars under perform the manufacturer’s mpg rating? t Test for Population Mean Number of Observations 24 Sample Standard Deviation 2.299814 Sample Mean 34.785846 Ho: ∗∗∗∗∗ Ha: ∗∗∗∗∗ T* ******* P[ T T*] 0.326268 T Critical, α =0.05 -1.713872 1. Which of the following would be appropriate for the alternative hypothesis? A. μ > 34.78 B. μ < 35 C. μ = 35 D. μ > 35 E. μ < 34.78 2. The decision rule, based on a table value, is reject Ho if T* (calculated value) is A. > 0.05 B. > 1.71 C. < -1.71 D. < 0.326 E. > 0.326 3. What is the calculated value of the test statistic? A. 0.326 B. 2.299 C. -0.456 D. 34.78 E. -1.713 4. What is the decision and conclusion of the test? A. Reject Ho, conclude there is convincing evidence that the cars do not under perform the manufacturer’s mpg rating. B.
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This note was uploaded on 03/09/2011 for the course DSC 3710 taught by Professor Staff during the Spring '09 term at North Texas.

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3710Exam1SummerII_2005 - COURSE: MSCI 3710 Exam 1 Summer II...

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