Twenty different video games showing drug use were observed. The duration times of drug use (in seconds) were recorded. When using this sample for a t test of the claim that the population mean is greater than 94 sec, what does df denote, and what is its value? What does df denote? OA. The test statistic OB. The sample size OC. The sample standard deviation D. The number of degrees of freedom The value of df is (Type an integer or a decimal. Do not round.)