Which of the following is the appropriate method for calculating the degrees of freedom associated with a correlation coefficient?
A)n − 1
B)n − 2
C)n − 3
D)n − 4

Question

Quizplus · Accepted Answer

The appropriate method for calculating the degrees of freedom associated with a correlation coefficient is n-2. This is because when calculating a correlation coefficient between two variables, we are estimating the population correlation coefficient based on a sample. We lose one degree of freedom for each variable used to calculate the correlation coefficient, which in this case is 2 (one variable for each of the two variables being correlated). Thus, the degrees of freedom associated with a correlation coefficient is n-2. Option B (n-2) is the correct answer.

Which of the Following Is the Appropriate Method for Calculating