SME_8e_Ch_04_Section_3

# SME_8e_Ch_04_Section_3 - CHAPTER 4 SECTION 3 NUMERICAL...

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1 CHAPTER 4 SECTION 3: NUMERICAL DESCRIPTIVE TECHNIQUES MULTIPLE CHOICE 142. When extreme values are present in a set of data, which of the following descriptive summary measures are most appropriate? a. Coefficient of variation and range b. Mean and standard deviation c. Interquartile range and median d. Variance and interquartile range ANS: C PTS: 1 REF: SECTION 4.3 143. The length of the box in the box plot portrays the: a. median. b. interquartile range. c. range. d. third quartile. ANS: B PTS: 1 REF: SECTION 4.3 144. In a negatively skewed distribution, which of the following is the correct statement? a. The distance from Q 1 to Q 2 is smaller than the distance from Q 2 to Q 3 b. The distance from the smallest observation to Q 1 is larger than the distance from Q 3 to the largest observation c. The distance from the smallest observation to Q 2 is smaller than the distance from Q 2 to the largest observation d. The distance from Q 1 to Q 3 is twice the distance from the Q 1 to Q 2 ANS: B PTS: 1 REF: SECTION 4.3 145. In a perfectly symmetric distribution, which of the following statements is false? a. The distance from Q 1 to Q 2 equals to the distance from Q 2 to Q 3 b. The distance from the smallest observation to Q 1 is the same as the distance from Q 3 to the largest observation c. The distance from the smallest observation to Q 2 is the same as the distance from Q 2 to the largest observation d. The distance from Q 1 to Q 3 is half of the distance from the smallest to the largest observation ANS: D PTS: 1 REF: SECTION 4.3 146. Which of the following summary measures cannot be easily approximated from a box plot? a. The range b. The interquartile range c. The second quartile d. The standard deviation ANS: D PTS: 1 REF: SECTION 4.3

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2 147. The interquartile range is the difference between the: a. largest and smallest numbers in the data set. b. 25 th percentile and the 75 th percentile. c. median and the mean. d. None of these choices. ANS: B PTS: 1 REF: SECTION 4.3 148. In a positively skewed distribution, which of the following is the correct statement? a. The distance from Q 1 to Q 2 is larger than the distance from Q 2 to Q 3 b. The distance from Q 1 to Q 2 is smaller than the distance from Q 2 to Q 3 c. The distance from Q 1 to Q 2 is twice the distance from Q 2 to Q 3 d. The distance from Q 1 to Q 2 is half the distance from Q 2 to Q 3 . ANS: B PTS: 1 REF: SECTION 4.3 149. Which measures of central location and variability are considered to be resistant to extreme values? a. The mean and standard deviation. b. The mode and variance. c. The median and interquartile range. d. None of these choices. ANS: C PTS: 1 REF: SECTION 4.3 150. Which of the following measures of variability is not sensitive to extreme values? a.
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## This note was uploaded on 09/28/2010 for the course FINOPMGT 250 taught by Professor Kumar during the Spring '10 term at University of Massachusetts Boston.

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SME_8e_Ch_04_Section_3 - CHAPTER 4 SECTION 3 NUMERICAL...

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