A study considers it the mean score on a college entrance exam for students In 2005 is any different from the mean score of 50}Ir for students who took the same exam in 19?5. Let p represent the mean score for all students who took the exam in 2005. Fora random sample of 40,000 students who took the exam in 2005. i: 505 and s = 100. Use this information to complete parts a through c below. a. Find the test statistic. t 2 (Round to two decimal places as needed.)