Question

suppose the correlation coefficient between a babys weight and the price of a computer is 0.87. which statement must be true?
a. as the baby gains weight, computer prices tend to increase.
b. as the baby gains weight, computer prices tend to decrease.
c. the babys weight gain causes the price of a computer to increase.
d. increased computer prices cause the baby to gain weight.

Explanation:

The correlation coefficient \(r = 0.87\) is positive. A positive correlation coefficient indicates that as one variable (in this case, baby's weight) increases, the other variable (computer price) also tends to increase. However, correlation does not imply causation. So, we cannot say that one variable causes the change in the other variable.

Answer:

A. As the baby gains weight, computer prices tend to increase.