Scores for a common standardized college aptitude test are normally distributed with a mean of 516 and a standard deviation of 96 Randomly selected students are given a Test Prepartion Course before taking this test Assume for sake of argument that the course has no effect If 1 of the students is randomly selected find the probability that their score is at least 543 9 P X 543 9 Enter your answer as a number accurate to 4 decimal places If 17 of the students are randomly selected find the probability that their mean score is at least 543 9 P X 543 9 Enter your answer as a number accurate to 4 decimal places