## 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

## 8.3 Inference for a Proportion: An Example of a Confidence Interval and a Hypothesis Test

I work through an example of a confidence interval and a hypothesis test for a single proportion, using normal approximation methods (Z test and confidence interval). The male birth rate data is from: Koshy et al. (2010). Parental smoking and … Watch the Video

## 8.4 Confidence Intervals for a Proportion: Determining the Minimum Sample Size

I discuss determining the minimum sample size required to achieve a given margin of error when estimating a population proportion. (For intervals based on the normal approximation.)

## 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

## 8.6 Inference for Two Proportions: An Example of a Confidence Interval and a Hypothesis Test

I work through an example of a confidence interval and a hypothesis test for the difference in population proportions (based on the normal approximation). The example involves an experiment investigating a possible effect of magnetic pulse on the ability of … Watch the Video