Video

Introduction to Chapter 9
An introduction to Chapter 9

Evaluating Levels of Significance
The Headless Professor takes about statistical significance but more importantly, the various levels of significance and what they mean.

Statistical Versus Practical Significance
Here's more discussion about statistical versus practical or applied significance where sample size and other factors are discussed.

Problem 8
Watch for the solution to this Time to Practice question.

Chapter Summary
Super cute reflections on learning statistics.

Web

Accepting and Rejecting the Null Hypothesis
Oops!! Different types of common mistakes you can make and their consequences.