QUESTION 7 Suppose two variables X and Y have a covariance of 0.96. Which of the

ID: 3173606 • Letter: Q

Question

QUESTION 7

Suppose two variables X and Y have a covariance of 0.96. Which of the following is true?

X and Y have a cause-and-effect relationship

X and Y are positively related, but we cannot say anything about how strong this relation is

X and Y are positively related, and this relation is very strong as covariance is close to 1

10 points

QUESTION 8

Suppose two variables X and Y have a correlation of -0.92. Which of the following is true?

X and Y are negatively related, and this relation is very strong as the correlation is close to 1

X and Y are independent

X and Y are negatively related, but we cannot say anything about how strong this relation is

X and Y have the same median

X and Y have a cause-and-effect relationship

X and Y are positively related, but we cannot say anything about how strong this relation is

X and Y are positively related, and this relation is very strong as covariance is close to 1

7.(2) is correct

Suppose two variables X and Y have a covariance of 0.96

Implies that X and Y are positively related, but we cannot say anything about how strong this relation is

Because it depends on the values of variances of X and Y

8. (1) is correct

Suppose two variables X and Y have a correlation of -0.92.

X and Y are negatively related, and this relation is very strong as the correlation is close to 1

By definitin of negative correlation.

X and Y are negatively related, and this relation is very strong as the correlation is close to 1

By definitin of negative correlation.

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