The correlation of a variable with itself will always be:
A)0.5
B)-0.5
C)1
D)-1
E)It will be different depending on the variable.

Question

Quizplus · Accepted Answer

The correlation of a variable with itself (also known as the autocorrelation or the correlation coefficient) will always be perfect at 1 since the variable is perfectly correlated with itself. It cannot be 0.5 or -0.5, as those values represent a weaker correlation or negative correlation between two different variables. It also cannot be -1 since that represents a perfect negative correlation between two different variables.

The Correlation of a Variable with Itself Will Always Be