Consider the population with mean 50ConsiderLet X~N(50, 1.5). Find the number that cuts off the upper 2.5% of values of X (in other words 97.5 percentile). the population with mean 50 and standard deviation 15. We draw a sample of size 100. According to the theorem a sampling distribution x is approximately normal with mean and standard deviation and standard deviation 15. We draw a sample of size 100. According to the theorem a sampling distribution x is approximately normal with mean and standard deviation