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Which of the following statistics provides the most information about how spread out a distribution of scores is?
(A) variance
(B) mean
(C) range
(D) median
(E) mode
Spoiler
Answer
(A) variance
Spoiler
Explanation
Measures of variability (e.g., variance, standard deviation, range) show how spread out a distribution of scores is. The range (the highest score minus the lowest score) is less informative than the variance or standard deviation, which shows the average distance of all scores in a distribution from the mean. The mean, median, and mode are measures of central tendency; their aim is to mark the center of a distribution, not to say how spread out the distribution is.
Posted : 21/04/2024 12:35 pm