TB Chapter 02 web

# TB Chapter 02 web - CHAPTER 2 GRAPHICAL AND TABULAR...

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CHAPTER 2 GRAPHICAL AND TABULAR DESCRIPTIVE TECHNIQUES SECTIONS 1 MULTIPLE CHOICE QUESTIONS In the following multiple-choice questions, please circle the correct answer. 1. Which of the following statements is false? a. All calculations are permitted on interval data b. All calculations are permitted on nominal data c. The most important aspect of ordinal data is the order of the data values d. The only permissible calculations on ordinal data are ones involving a ranking process ANSWER: b 2. The average number of units earned per semester by college students is suspected to be rising. A researcher at Boston College wishes to estimate the number of units earned by students during the spring semester of 2004 at Boston. To do so, he randomly selects 250 student transcripts and records the number of units each student earned in the spring term of 2004. The variable of interest to the researcher is the a. number of students enrolled at Boston College during the spring term of 2004 b. average indebtedness of Boston College students enrolled in the spring c. age of Boston College students enrolled in the spring d. number of units earned by Boston College students during the spring term of 2004 ANSWER: d 3. The classification of student major (accounting, economics, management, marketing, other) is an example of a. a categorical random variable. b. a discrete random variable c. a continuous random variable d. a parameter. ANSWER: a 13

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14 Chapter Two TRUE / FALSE QUESTIONS 9. Quantitative variables usually represent membership in groups or categories. ANSWER: F 10. Interval data, such as heights, weights, and incomes, are also referred to as quantitative or numerical data. ANSWER: T 11. Nominal data are also called qualitative or categorical data. ANSWER: T 15. Professor Hogg graduated from the University of Iowa with a code value = 2 while Professor Maas graduated from Michigan State University with a code value = 1. The scale of measurement likely represented by this information is interval. ANSWER: F 18. An automobile insurance agent believes that company “A” is more reliable than company “B”. The scale of measurement that this information represents is the ordinal scale. ANSWER: T
Graphical and Tabular Descriptive Techniques 15 22. For each of the following examples, identify the data type as nominal, ordinal, or interval. a. The letter grades received by students in a computer science class b. The number of students in a statistics course c. The starting salaries of newly Ph.D. graduates from a statistics program d. The size of fries (small, medium, large) ordered by a sample of Burger King customers e. The college you are enrolled in (Arts and science, Business, Education, etc.) ANSWER: a. Ordinal b. Interval c. Interval d. Ordinal e. Nominal SECTION 2 MULTIPLE CHOICE QUESTIONS In the following multiple-choice questions, please circle the correct answer. 30.

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## This note was uploaded on 11/22/2010 for the course ISDS 361A ISDS 361A taught by Professor Goldstein during the Spring '10 term at CSU Fullerton.

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TB Chapter 02 web - CHAPTER 2 GRAPHICAL AND TABULAR...

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