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List of RES341 Final Exam Questions. Online Business Degree Study Guide.

Answers to the Final Exam in RES341 Statistics in the Online Business Degree Program .

  1. A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime. Further, 79% of these “heavy antibiotics users” developed breast cancer. According to the American Cancer Society, one in twelve women will develop breast cancer at some time in her life. Of the numbers mentioned, which are parameters?
  2. A sufficiently large coverage error will result in which of the following?
  3. When every member of a population has the chance of being selected based on the probability, or frequency, of its representation in that population, you are using which type of sampling?
  4. Which of the following statements is NOT true?
  5. Which of the following is an example of statistical inference?
  6. Which one of the following is NOT part of the 5 step hypothesis testing procedure?
  7. The manipulation of the independent variable is known as the
  8. Name the item that is NOT a recognized survey guideline
  9. Which of the following is NOT a basic step in conducting a survey?
  10. Which of the following is NOT a potential source of survey error?
  11. A statistical researcher must be concerned about which of the following ethical issues?
  12. Which of the following would NOT be considered and potential pitfall for a researcher?
  13. Which of the following is NOT an ethical concern for the statistical researcher?
  14. A study of the scores on an in plant course in management principles and the years of service of the employees enrolled in the course yielded the following statistics...
  15. The average score for a class of 30 students was 75. The 20 male students in the class averaged 70. The 10 female students in the class averaged
  16. Estimate the standard deviation of the price of a textbook
  17. Which measurement uses absolute values?
  18. Which of these measurement scales has a rank order associated with its use?
  19. Identify the scale which has no meaningful zero
  20. Which of the following cannot generate a Poisson distribution?
  21. Which of the following is a characteristic of every binomial distribution?
  22. The local police department must write, on average, 5 tickets a day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 5.5 tickets per day. Interpret the value of the mean.
  23. Which of these parameters associated with a binomial experiment will produce a probability distribution with the smallest standard deviation; given n is the same for each situation?
  24. Trudy Jones recently completed her certification examination and learned that her z-score was –2.5. The examining board also informed her that a failure to pass would be all scores that were 1 or more standard deviations below the mean and that those with scores higher than 2 standard deviations above the mean would receive a special commendation award. Trudy can, therefore, conclude that she
  25. The Big Red Arcade and Pizza Palace caters to young teens and sells tokens to play arcade games for 25¢ each and slices of pizza for 50¢ each. The distribution of sales of pizza slices per customer and sales of arcade tokens per customer is below
  26. For a sample size of 1, the sampling distribution of the mean will be normally distributed
  27. A random variable follows the student’s t distribution. The probability that it will be positive is
  28. The use of the student’s t distribution requires which of the following assumptions?
  29. Ceteris paribus, which is narrower, a 95% confidence interval with n=100 or a 99% confidence interval with n=30?
  30. A study of 200 insomniacs paid for by the Serta Mattress Company found that the average insomniac counted 350 sheep before falling asleep, with a standard deviation of 120. Calculate the margin of error for a 78% confidence interval of the true proportion of insomniacs who regularly watch David Letterman before counting sheep.
  31. Construct a 95% confidence interval estimate for the difference between the means of two normally distributed populations, where the unknown population variances are assumed to not be equal. The upper confidence limit is
  32. In statistical process control, a Type I error occurs if we decide that the process is
  33. To tell if the standard deviation of a process has changed, the control charts used are
  34. When the results of a process are either defective or acceptable, the charts used for SPC are called
  35. A poll is planned to determine what proportion of all students favor an increase in fees to support a new track and field stadium. A questionnaire will be published and the first 1000 completed questionnaires will be analyzed. Which of the following errors will be associated with the sample?
  36. Which of the following is NOT a characteristic of an ideal statistician?
  37. can be defined as a logically conjectured relationship between two or more variables expressed in the form of a testable statement
  38. Which of these is NOT an acceptable type of survey question?
  39. A supermarket has determined that daily demand for eggs has a bell-shaped distribution, with a mean of 55 cartons and a standard deviation of six cartons.
  40. A child was born into the Doe family each year for five consecutive years. What is the variance of the ages of the Doe children?
  41. The Information Commons in the main library has 150 personal computers. The probability that any one of them will require repair on a given day is 0.02. To find the probability that exactly 25 of the computers will require repair, one would use what type of probability distribution?
  42. Big Red Arcade: What is the total expected per-customer revenue for pizza slice sales and arcade token sales?
  43. A popular restaurant recently asked 300 customers how may times per month they ate steak for dinner. The results were used to build the following probability distribution
  44. The expected value of the sampling distribution of the sample mean equals the population mean
  45. A random variable follows the student’s t distribution. The probability that it will be positive is
  46. A random sample of 25 observations is selected from a normally distributed population. The sample variance is 10. In the 95% confidence interval for the population variance, the upper limit will be
  47. When no point lies outside the control limits of a chart, we conclude that variation in the process is
  48. When a change has occurred in the mean of the process distribution, the result is referred to as

 


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