2. Twenty-nine different video games showing violence were observed. The duration times of violence (in seconds) were recorded. When using this sample for a t test of the claim that the population mean is greater than 95 sec, what does of denote, and what is its value? What does di denote? O A. The sample standard deviation OB. The number of degrees of freedom O C. The test statistic OD. The sample size The value of df is (Type an integer or a decimal. Do not round.)