Answer:
C. -1.6
Step-by-step explanation:
The letter "r" designates the correlation coefficient between two sets of data. It is the ratio of their covariance to the product of their standard deviations.
What values can r have?
When two sets of data are perfectly correlated, the r-value is 1. When they are perfectly anti-correlated, the r-value is -1. Where there is no correlation at all, the r-value is zero. That is, we must have ...
|r| ≤ 1
The magnitude of the r-value can never be greater than 1, so ...
-1.6 is a disallowed value
