Identify the degrees of freedom in the equation r₍₆₅₎ = 0.45,p < 0.05.

A) 0.35
B) 35
C) 0.65
D) 65

In the given equation, there are 65 degrees of freedom, represented by the subscript 65 in the term r₍₆₅₎. Degrees of freedom are the number of cases in a sample that are free to vary after certain constraints have been imposed on the sample. In this case, the constraints come from the experimental design and statistical analyses used. The degrees of freedom are important in statistical hypothesis testing because they help determine the critical values of test statistics and the p-values associated with them. Therefore, the correct answer is D, 65, as it represents the correct number of degrees of freedom in the equation.