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58. Which measure(s) of central tendency separate(s) the top half of the group from the bottom half?
A. Median
B. Mean
C. Median and Mean
D. Mode
59. Which applies when skewness is zero?
A. Mean is greater than the median.
B. Median is greater than mean.
C. Scores have three modes.
D. Scores are normally distributed.
60. Standard Deviation is to variability as mode to _.
A. Level of difficulty
B. Discrimination
C. Correlation
D. Central tendency
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