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Unformatted text preview: CHAPTER 2 SECTION 6: GRAPHICAL AND TABULAR DESCRIPTIVE TECHNIQUES MULTIPLE CHOICE 202. The relationship between two interval variables is graphically displayed by a a. scatter diagram b. histogram c. bar chart d. pie chart ANS: A PTS: 1 REF: SECTION 2.6 203. In order to draw a scatter diagram, we need interval data for a. one variable b. two variables c. three variables d. four variables ANS: B PTS: 1 REF: SECTION 2.6 204. Which of the following statements is false? a. You can examine the relationship between two nominal variables using a cross- classification table. b. You can only apply statistical techniques to one variable at a time. c. You can examine the relationship between two interval variables using a scatter diagram. d. None of these choices. ANS: B PTS: 1 REF: SECTION 2.6 205. How do you determine whether two interval variables have a positive linear relationship? a. Most of the points fall close to a straight line with positive slope. b. As the X variable increases, the Y variable increases in a linear way. c. The scatter diagram shows a linear pattern that is going uphill. d. All of these choices are true. ANS: D PTS: 1 REF: SECTION 2.6 206. If the data in a scatter diagram is scattered completely at random, what do you conclude? a. There is no linear relationship between X and Y . b. There is a strong linear relationship between X and Y . c. There is a strong linear relationship between X and Y that is described by a horizontal (flat) line. d. None of these choices. ANS: A PTS: 1 REF: SECTION 2.6 This edition is intended for use outside of the U.S. only, with content that may be different from the U.S. Edition. This may not be resold, copied, or distributed without the prior consent of the publisher. 207. Which of the following is the method statisticians use to draw the best fitting straight line through the data on a scatter diagram? a. The fit best method. b. The least squares method. c. The point-intercept method. d. None of these choices. ANS: B PTS: 1 REF: SECTION 2.6 208. Which of the following describes a positive linear relationship between X and Y ? a. As the X values increase, the Y values increase in a linear manner. b. As the X values decrease, the Y values decrease in a linear manner. c. The X and Y values move uphill together in a linear manner. d. All of these choices are true. ANS: B PTS: 1 REF: SECTION 2.6 209. When two variables tend to move in opposite directions, yet still form a linear pattern, how do you describe their relationship?...
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This note was uploaded on 04/08/2012 for the course ADMS 2320 taught by Professor Rochon during the Spring '08 term at York University.
- Spring '08