Which of the following is/are true?
I. Doubling every single value in a sample doubles the sample median.
II. Adding a constant to each value in a sample causes the median to increase by the same constant.
III. The median of a sample decreases as the number of observations increases.
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A. B. C. D. E. F. G.G
The median of a set with odd number of observations equals the "middle" observation. If the number of observations is even, the median is the mean of the two middle observations. From this, I & II follow. (III) is not necessarily true.