SME_8e_Ch_02_Section_6 - CHAPTER 2 SECTION 6: GRAPHICAL AND...

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1 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
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2 207. 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.
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SME_8e_Ch_02_Section_6 - CHAPTER 2 SECTION 6: GRAPHICAL AND...

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