When computing a correlation coefficient,if you have 27 degrees of freedom,your sample size must be ______.
A)25
B)27
C)29
D)26

Question

Quizplus · Accepted Answer

In order to compute a correlation coefficient, you need to have two sets of data with corresponding values. Therefore, the sample size for correlation should include at least 2 data values. The formula for degrees of freedom in correlation is (n-2). Substituting 27 for (n-2), we can solve for n which equals 29. Therefore, the sample size must be 29.

When Computing a Correlation Coefficient,if You Have 27 Degrees of Freedom,your