STAT 500 Comprehensive Assignment Answers

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STAT 500 Comprehensive Assignment Summer 09 Due: No later than 5:00 pm Friday Sept 18 Total points: 110 points (Questions 1 thru 15, Six(6) points each. Question 16, worth 20 points) This assignment worth 30% of your course grade(per course syllabus) You will not be able to submit your assignment after the due time/date. Please submit your answer sheet to the designated area labeled “Submit your Assignment Here”. Please only submit Ms word document 2003 or 2007 or excel. Any other form of submission WILL NOT BE GRADED Questions 1—15 (Six points each) 1. Explain how it can be misleading to report only the mean of a distribution without any measure of the Variability. Give an example to…show more content…
Thirty-six of the staff of 80 teachers at a local intermediate school are certified in Cardio-Pulmonary Resuscitation (CPR). In 180 days of school, about how many days can we expect that the teacher on bus duty will likely be certified in CPR? a. 5 days b. 45 days c. 65 days d. 81 days 8. What type of probability distribution will most likely be used to analyze warranty repair needs on new cars in the following problem? The service manager for a new automobile dealership reviewed dealership records of the past 20 sales of new cars to determine the number of warranty repairs he will be called on to perform in the next 90 days. Corporate reports indicate that the probability any one of their new cars needs a warranty repair in the first 90 days is 0.05. The manager assumes that calls for warranty repair are independent of one another and is interested in predicting the number of warranty repairs he will be called on to perform in the next 90 days for this batch of 20 new cars sold. a) binomial distribution. b) Poisson distribution. c) hypergeometric distribution. d) none of the above. 9. What type of probability distribution will most likely be used to analyze the number of chocolate chip parts per cookie in the following…show more content…
n = 1,844 b. n = 1,784 c. n = 1,503 d. n = 1,435 14. How many Kleenex should the Kimberly Clark Corporation package of tissues contain? Researchers determined that 60 tissues is the average number of tissues used during a cold. Suppose a random sample of 100 Kleenex users yielded the following data on the number of tissues used during a cold: [pic] = 52, s = 22. Suppose the test statistic does fall in the rejection region at [pic] = 0.05. Which of the following conclusions is correct? a. At [pic] = 0.05, there is not sufficient evidence to conclude that the average number of tissues used during a cold is 60 tissues. b. At [pic] = 0.05, there is sufficient evidence to conclude that the average number of tissues used during a cold is 60 tissues. c. At [pic] = 0.05, there is not sufficient evidence to conclude that the average number of tissues used during a cold is not 60 tissues. d. At [pic] = 0.10, there is sufficient evidence to conclude that the average number of tissues used during a cold is not 60

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