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1 CHAPTER 3: NUMERICAL DESCRIPTIVE MEASURES 1. Which of the following statistics is NOT a measure of central tendency? a) arithmetic mean b) median c) mode d) Q3 2. Which measure of central tendency can be used for both numerical and categorical variables? 3. Which of the arithmetic mean, median, mode, and geometric mean are resistant measures of central tendency? 4. In a right-skewed distribution, 5. Which of the following statements about the median is not true? a) It is more affected by extreme values than the arithmetic mean. b) It is a measure of central tendency. c) It is equal to Q2. d) It is equal to the mode in bell-shaped "normal" distributions. 6. In a perfectly symmetrical bell-shaped "normal" distribution 7. In a perfectly symmetrical distribution
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2 8. When extreme values are present in a set of data, which of the following descriptive summary measures are most appropriate? 9. In general, which of the following descriptive summary measures cannot be easily approximated from a box- and-whisker plot? a) the variance b) the range c) the interquartile range d) the median 10. The smaller the spread of scores around the arithmetic mean, 11. Which descriptive summary measures are considered to be resistant statistics? 12. In right-skewed distributions, which of the following is the correct statement?
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