Statistics for Decision Making final exam

# Statistics for Decision Making final exam - Statistics for...

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Statistics for Decision Making final exam 1. Question: (TCO 9) The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the nearest \$100. Your Answer: 97,100 88,300 CORRECT ANSWER 56,700 INCORRECT 92,800 Instructor Explanation: Textbook Chapter 9, week 2 lecture Points Received: 0 of 6 2. Question: (TCO 5) A company produces window frames. Based on a statistical analysis, we found that 15% of their product is defective. They have shipped 10 windows to one of their customers. The customer is worried about the probability of having defective frames. Choose the best answer of the following: Your Answer: This is an example of a Poisson probability experiment This is an example of a Binomial probability experiment CORRECT This is neither a Poisson nor a Binomial probability experiment Not enough information to determine the type of experiment Instructor Explanation: Ch4: binomial and Poisson distribution concepts. Points Received: 6 of 6 3. Question: (TCO 5) A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering 3 OR 4 questions correctly. Your Answer: 0.131836 0.032959 0.004639 0.164795 CORREC T Instructor Explanation: Ch-4 by the Binomial distribution formula we get: P(x=3 OR x=4)=P(3)+P(4)= 0.131836+0.032959=0.164795 Points Received: 6 of 6 4. Question:

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(TCO 5) It has been recorded that the average number of errors in a newspaper is 4 mistakes per page. What is the probability of having 1 or 2 errors per page? Your Answer: 0.073263 0.146525 0.219788 CORREC T 0.219788 Instructor Explanation: Ch-4 By the Poisson distribution formula we get: P(x=1 OR x=2)=P(1)+P(2)= 0.073263+0.146525=0.219788 Points Received: 6 of 6 5. Question: (TCO 2) The median height of the players on a high school basketball team is 68 inches. What does this tell you about the typical height of a player on this team? Your Answer: Half the players are taller than 68 inches while half are shorter CORRECT ANSWER The average height of the players on the team is 68 inches INCORRECT More players are 68 inches tall than any other height. The height of all the players is not very consistent because 68 is such a large number Instructor Explanation: Textbook Chapter 2 Page 68, week 1 lecture Points Received: 0 of 6 6. Question: (TCO 6) Using the standard normal distribution, find the probability that z is greater than 1.78 Your Answer: 0.0384 0.9625 0.9319 0.0375 CORREC T Instructor Explanation: Ch5: From the Standard Normal Distribution table: p(z>1.78)=1-p(1.78)=1- 0.9625=0.0375 Points Received: 6 of 6 7. Question: (TCO 8) The mean age of school bus drivers in Denver is claimed to be 56.9 years. A hypothesis test is performed at a level of significance of 0.01 with a P
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## This note was uploaded on 09/07/2010 for the course MATH 221 taught by Professor Bethdodson during the Spring '10 term at DeVry Chicago.

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Statistics for Decision Making final exam - Statistics for...

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