Suppose we have two variables, X 1 and X 2 , where X 2 is constant for all values in the sample. Which statements are correct? (Multiple answers allowed)

Question

Suppose we have two variables, X 1  and X 2 , where X 2  is constant for all values in the sample. Which statements are correct? (Multiple answers allowed)

Answer

The covariance between X 1  and X 2  is zero.

Answer

The correlation coefficient between X 1  and X 2  is zero.

Answer

The covariance between X 1  and X 2  is positive.

Answer

The covariance between X 1  and X 2  is negative.

Answer

Excel is unable to calculate the correlation coefficient between X 1  and X 2 .

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Suppose we have two variables, X 1 and X 2 , where X 2 is constant for all val...

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