HO Problem 4.3.11 The cost of university education is normally distributed with students paying an average of $200 per week and a standard deviation of $50. (a) 20% of students pay less than how much? 5% of students pay more then how much? Problem 4.4.5 For a standard normal variable Z, find z such that 1. P(Z > z) = 0.4 2. P(Z > z) = 0.6 3. P(-z