This document contains sections from a textbook on elementary statistics and the central limit theorem. It provides an explanation of the central limit theorem, which states that the distribution of sample means approaches the normal distribution as sample size increases, regardless of the population distribution. It also contains examples demonstrating how the distribution of means becomes more normal for different population distributions as the sample size grows. Finally, it includes an example problem applying the central limit theorem to calculate the probability that the total weight of 16 male passengers exceeds the maximum capacity of an elevator.