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Ch04_Sect02_Keller MS_AISE TB

# Ch04_Sect02_Keller MS_AISE TB - CHAPTER 4 SECTION 2...

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CHAPTER 4 SECTION 2: NUMERICAL DESCRIPTIVE TECHNIQUES MULTIPLE CHOICE 75. A sample of 20 observations has a standard deviation of 3. The sum of the squared deviations from the sample mean is: a. 20. b. 23. c. 29. d. 171. ANS: D PTS: 1 REF: SECTION 4.2 76. If two data sets have the same range: 77. The Empirical Rule states that the approximate percentage of measurements in a data set (providing that the data set has a bell shaped distribution) that fall within two standard deviations of their mean is approximately: 78. Which of the following summary measures is affected most by extreme values? 79. Chebysheff's Theorem states that the percentage of measurements in a data set that fall within three standard deviations of their mean is: a. 75%. b. at least 75%. c. 89%. d. at least 89%. ANS: D PTS: 1 REF: SECTION 4.2 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.

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80. Which of the following is a measure of variability? 81. The smaller the spread of scores around the mean: 82. Is a standard deviation of 10 a large number indicating great variability, or is it small number indicating little variability? To answer this question correctly, one should look carefully at the value of the: 83. Which of the following types of data has no measure of variability? a. Interval data b. Nominal data c. Bimodal data d. None of these choices. ANS: B PTS: 1 REF: SECTION 4.2
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Ch04_Sect02_Keller MS_AISE TB - CHAPTER 4 SECTION 2...

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