chap03-TIF-BSAFC5.doc

CHAPTER 3: NUMERICAL DESCRIPTIVE MEASURES Which of the following statistics is not a measure of central tendency? Arithmetic mean. Median. Mode. Q3. ANSWER: d TYPE: MC DIFFICULTY: Easy KEYWORDS: measure of central tendency, arithmetic mean, median, mode, quartiles Which measure of central tendency can be used for both numerical and categorical variables? Arithmetic mean. Median. Mode. Standard deviation. ANSWER: c TYPE: MC DIFFICULTY: Moderate KEYWORDS: measure of central tendency, mode, arithmetic mean, median Which of the arithmetic mean, median, and mode are resistant measures of central tendency? The arithmetic mean and median only. The median and mode only. The mode and arithmetic mean only. All the three are resistant measures. ANSWER: b TYPE: MC DIFFICULTY: Moderate KEYWORDS: measure of central tendency, resistant to outliers, mean, median, mode In a right-skewed distribution the median equals the arithmetic mean. the median is less than the arithmetic mean. the median is larger than the arithmetic mean. none of the above. ANSWER: b TYPE: MC DIFFICULTY: Easy KEYWORDS: shape Which of the following statements about the median is not true? It is more affected by extreme values than the arithmetic mean. It is a measure of central tendency. It is equal to Q2. It is equal to the mode in bell-shaped normal distributions. ANSWER: a TYPE: MC DIFFICULTY: Easy KEYWORDS: median, measure of central tendency, resistant to outliers, quartile In a perfectly symmetrical bell-shaped normal distribution the arithmetic mean equals the median. the median equals the mode. the arithmetic mean equals the mode. All the above. ANSWER: d TYPE: MC DIFFICULTY: Easy KEYWORDS: shape, normal distribution In a perfectly symmetrical distribution the range equals the interquartile range. the interquartile range equals the arithmetic mean. the median equals the arithmetic mean. the variance equals the standard deviation. ANSWER: c TYPE: MC DIFFICULTY: Easy KEYWORDS: shape