DSCI 3710 Exam 2A Fall 2011 - COURSE DSCI 3710 Print Name Exam 2 version A Signature Fall 2011 Student ID INSTRUCTIONS Please print your name and

DSCI 3710 Exam 2A Fall 2011 - COURSE DSCI 3710 Print Name...

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COURSE: DSCI 3710 Print Name: Exam 2 – version A Signature: Fall 2011 Student ID#: INSTRUCTIONS: xPlease 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 120 minutesto complete this exam. 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 in your scantron and exam booklet to your instructor, at the front desk. No cheating.Good luck and we wish you well on the exam. Note: Whenever 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.
Use the information given below to answer the next four questions. A salesman for a new manufacturer of cellular phones claims that the percentage of defective cellular phones found among his products, ()p1, will be at least as low as the percentage of defectives found in a competitor's line, ()p2. To test this statement, the retailer took a random sample of 235 of the salesman's cellular phones and 185 of the competitor's cellular phones. The retailer found that 15 of the salesman's cellular phones and 6 of the competitor's cellular phones were defective. Use a significance level of D= 0.01 for the test. 1. What are the null hypothesis and alternative hypothesis for this test? )1222. What is the absolute critical (table) value for testing the hypothesis based on the salesman’s claim at the 1% level of significance?

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