Posted by **John** on Monday, November 12, 2012 at 9:26am.

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

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