RES 341 Final Exam Instant Download. 64 Total Answers.
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Format: Microsoft WordVersion: 2017 Exam Version
30. Identify the scale which has no meaningful zero.
31. Which measurement uses absolute values?
A. ratio correct
B. harmonic scale
C. ordinal scale
D. interval scale
32. Which of these measurement scales has a rank order associated with its use?
33. The expected value of the sampling distribution of the sample mean equals the population mean
A. when the population is normally distributed.
B. when the population is symmetric.
C. when the population size N > 30.
D. for all populations.
34. For a sample size of 1, the sampling distribution of the mean will be normally distributed
A. regardless of the shape of the population.
B. only if the shape of the population is positively skewed.
C. only if the population values are larger than 30.
D. only if the population is normally distributed.
35. A random variable follows the student’s t distribution. The probability that it will be positive
C. less than 0.50.
36. 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?
A. Sampling errors and errors due to selection bias
B. Sampling errors only
C. Errors due to interviewer bias and selection bias
D. Only non-sampling errors
37. Which of the following is NOT a characteristic of an ideal statistician?
A. Technically current (e.g. software)
B. Can deal with imperfect information
C. Communicates well (both written and oral)
D. Adapts answers to client desires
38. Which of the following is an example of statistical inference?
A. Counting the number of patients who file malpractice suits after being discharged from hospitals in New York State.
B. Calculating the amount of fly spray needed for your orchard next season.
C. Calculating the mean number of fruit trees damaged by Mediterranean fruit flies in California last year.
D. Calculating the mean age of patients discharged from hospitals in New York State in 1997.
39. Which of the following statements is NOT true?
A. Scientific progress consists of continual refinement of theories through hypothesis testing.
B. A statistical test may be significant yet have no practical importance.
C. Statistics is the science of collecting, organizing, analyzing, interpreting, and presenting data.
D. Estimating parameters is an important aspect of descriptive statistics.
40. A __________ can be defined as a logically conjectured relationship between two or more variables expressed in the form of a testable statement.
A. research design
B. theoretical framework
C. research problem
41. The manipulation of the independent variable is known as the ________.
A. experimental test
42. Which of the following is NOT an ethical concern for the statistical researcher?
A. Conceal financial support
B. Maintain data accuracy
C. Accurate reporting of procedures
D. Accepted procedures are followed
43. Which of the following is not an ethical concern for the statistical researcher?
A. Cite sources
B. Inhumane treatment of animals
C. Manipulation of data
D. Privacy of privacy
44. 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. If the supermarket begins each morning with a stock of 61 cartons of eggs, approximately what percentage of days will there be a surplus of eggs?
45. Textbook PriceNumber of Textbooks
$25 to $352
35 to 4516
45 to 555
55 to 657
65 to 7520
Estimate the standard deviation of the price of a textbook.
46. Which of these is NOT an acceptable type of survey question?
A. leading question
B. ranking questions
D. Likert scale