Simulate a sample of size n = 20 from a N(0, 1) distribution and compute the value of the composite Kolmogorov-Smirnov test statistics ┌n˜Dn using ¯X and s as the estimates of μ and the variance. Next compute it using the true values μ = 0 and the variance = 1. Repeat this 1000 times (Monte-Carlo simulations).