Twenty-nine 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 88 sec, what does df denote, and what is its value? What does df denote? O A. The sample standard deviation 0 B. The number of degrees of freedom 0 c. The sample size 0 D. The test statistic The value of df is E. (Type an integer or a decimal. Do not round.)