6.2 Z Tests for One Mean: Introduction

An introduction to Z tests for a population mean mu. These tests are appropriate when sampling from a normally distributed population where sigma is known. I discuss the hypotheses and the underlying logic, and work through an example. I do … Watch the Video

6.4 Z Tests for One Mean: The p-value

An introduction to the concept of the p-value in a Z test. This video discusses the p-value in the context of a Z test for one mean, but the same logic holds for other Z tests.

6.5 Z Tests for One Mean: An Example

An example of a Z test on the population mean mu. This test is appropriate when sampling from a normally distributed population, when the population standard deviation sigma is known.

6.6 What is a p-value?

An introduction to the concept of the p-value, in the context of one-sample Z tests for the population mean. Much of the underlying logic holds for other tests as well. I discuss what a p-value is, then using simulation I … Watch the Video

6.8 One-Sided Test or Two-Sided Test?

A discussion of when to use a one-sided alternative hypothesis and when to use a two-sided alternative hypothesis in hypothesis testing. I assume that the viewer has already had a brief introduction to the notion of one-sided and two-sided tests.