8.1 An Introduction to Inference for a Proportion

An introduction to inference procedures for a single proportion. I discuss confidence intervals and hypothesis testing methods for a single proportion, based on the normal approximation. This video does not do an example of the calculations — I work through … Watch the Video

8.2 The Sampling Distribution of the Sample Proportion

A discussion of the sampling distribution of the sample proportion. I discuss how the distribution of the sample proportion is related to the binomial distribution, discuss its mean and variance, and illustrate that the sample proportion is approximately normally distributed … Watch the Video

8.5 An Introduction to Inference for Two Proportions

I discuss the sampling distribution of the difference in sample proportions, and confidence intervals and hypothesis tests for the difference in population proportions (using large sample Z procedures based on the normal approximation). The male birth rate data is from: … Watch the Video