Statistics
posted by John .
Which of the following statements about the correlation coefficient r are true?
I. It is not affected by changes in the measurement units of the variables.
II. It is not affected by which variable is called x and which is called y.
III. It is not affected by extreme values.
I only
II and III only
III only
I and II only
I, II, and III

I would say I and II only.
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