You looked up 0.025 on your table. You need to look up 0.75 (!), because that would be the probability to the leftt of the desired height; 0.25 is to the right Then the rest bis OK.Originally Posted by sarugaki
x=174.5 + (-1.96 * 6.9) = 160.976
Yes, with a different z.Question 2: Is the process the same for the bottom 20%?