University of Maryland, College Park - STAT 200 Midterm Exam (1) All Correct Answers

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STAT 200-Midterm Multiple-Choice: Choose exactly ONE answer for each question. There are 40 problems for 2.5 points each for a total of 100 points. 01. An Internet study asked respondents to indica... te their education level on the following scale: Less than High School, High School, Some College, College +. Which of the following statements is (are) true? A. Education level is a qualitative variable. B. Education level is nominal scaled. C. Education level is ordinal scaled. D. Both A and B E. Both A and C Consider the following to answer the next two questions: The administration of a large university is interested in learning about the types of wellness programs that would interest its employees. To do this, they plan to survey a sample of their employees. 02. Suppose that there are five categories of employees (administration, faculty, professional staff, clerical and maintenance) and the university decides to randomly select ten individuals from each category. This sampling plan is called A. Simple Random Sampling. B. Stratified Sampling. C. Cluster Sampling. D. Systematic Sampling. E. Convenience Sampling. 03. Suppose that the university randomly selects a school (e.g., the Business School) and surveys all of the individuals (administration, faculty, professional staff, clerical and maintenance) who work in that school. This sampling plan is called A. Simple Random Sampling. B. Stratified Sampling. C. Cluster Sampling. D. Systematic Sampling. E. Convenience Sampling. Consider the following to answer the next two questions: Page 2 of 10 The box-plots below show monthly sales revenue figures ($ thousands) for a discount office supply company with locations in three different regions of the U.S. (Northeast, Southeast and West). Northeast Southeast West 200 175 150 125 100 75 50 Data Boxplot of Northeast, Southeast, West 04. Which of the following statements is true? A. The southeast has the lowest sales revenues. B. The southeast has the lowest median sales revenue. C. The west has the lowest mean sales revenue. D. The west has the lowest median sales revenue. E. None of the above. 05. Which of the following statements is false? A. The west has the most variable sales revenues. B. The west has the largest IQR. C. The southeast has the smallest IQR. D. The northeast has the most variable sales revenues. E. The southeast has the least variable sales revenues. 06. The collection of all subjects that are being studied is A. The sample. B. The population. C. Statistical inference. D. Descriptive statistics. E. None of the above. 07. Temperature in Fahrenheit or Centigrade scale is an example of a variable that uses Page 3 of 10 A. the ratio scale B. the interval scale C. the ordinal scale D. the nominal scale E. none of the above [Show More]

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