In the survey of a random sample of students at a university. A professor is interested in whether students who have watched TV ( group 1) in the past week study fewer hours on average per week than...

Extracted text: In the survey of a random sample of students at a university. A professor is interested in whether students who have watched TV ( group 1) in the past week study fewer hours on average per week than those who have not ( group 2). An :analysis of the results produce the following information SD ( standard deviation) Mean n TV 6.50 12.72 40 YES 7.65 15.35 120 NO ?Which of the following is the appropriate test statistics 12.72-15.35 t 3D (6.50)², (7.65) A O 40 120 12.72-15.35 t%3D .BO (6.44)2 (8.65)2 45 125 12.72-15.35 C O V6.50+7.65 None of these .D C 12.41-15.53 E 6.50 7.65 120 40