Which of the following statements about the correlation coefficient r are true?

Question

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

Answer 1

I would say I and II only.

Answer 2

III only