A right-skewed distribution. A) the median is less than the arithmetic mean. B)

Question

A right-skewed distribution. A) the median is less than the arithmetic mean. B) the median is greater than the arithmetic mean. C) the median equals the arithmetic mean. D) None of the above. In a perfectly symmetrical bell-shaped "normal" distribution. A) the arithmetic mean equals the mode. B) the arithmetic mean equals the median. C) the median equals the mode. D) All of the above. In a perfectly symmetrical distribution. A) the variance equals the standard deviation. B) the range equals the interquartile range. C) the interquartile range equals the arithmetic mean. D) the median equals the arithmetic mean. According to the empirical rule, if the data form a "bell-shaped" normal distribution, _____ percent of the observations will be contained within 2 standard deviations around the arithmetic mean. A) 88.89 B) 95.44 C) 68.26 D) 93.75 Which of the following is sensitive to extreme values? A) the 1^st quartile B) the median C) the arithmetic mean D) the interquartile range Which of the following is the easiest to compute? A) the mode B) the geometric mean C) the arithmetic mean D) the median Which of the following is not a measure of central tendency? A) the interquartile range B) the arithmetic mean C) the mode D) the geometric mean Which of the following is not sensitive to extreme values? A) the range B) the interquartile range C) the standard deviation D) the coefficient of variation Which of the following statistics is not a measure of central tendency? A) Q_3 B) arithmetic mean C) mode D) median Write the word or phrase that best completes each statement or answers the question. Describe the procedure for computing frequencies What measures of variation are commonly computed? What is kurtosis? What does it mean?

Explanation / Answer

12 ) mean > median in right skewed

option A) is correct

13) D) all the above

14) D) median = mean

15) B) 95.44 remember empirical rule

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