Chapter 11: Introduction to Hypothesis Testing

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Lessons

Steps of a Hypothesis Test

Length: 41 minutesAuthor: JasonComplexity: Easy

The steps of a hypothesis test - for ANY hypothesis test - are always the same. This includes not only the z-test introduced in this chapter, but also all other types of hypothesis tests introduced in the chapters to come.

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When to use the z-test of One Population Mean (Preview)

Length: 3 minutesAuthor: JasonComplexity: Easy

In the chapters that follow, you’ll be introduced to several different formulas for hypothesis tests. Each of these formulas is designed for a different set of conditions (number of populations being studied, type of data collected, focus of the study, etc). This video explains when to use the z-test population of μ.

The p-Value

Length: 28 minutesAuthor: JasonComplexity: Easy

There are a few reasons someone would determine the value of a p-value:

  • The p-value is an alternate method for deciding whether or not to reject Ho (as opposed to using a rejection region)
  • The p-value tells you the exact probability of selecting a sample as rare as the one you have - given that the Ho is true (the rejection region does not do this)
  • It will get you the mark you need when asked to 'calculate the p-value' :)

To access all lessons in Chapter 11: Introduction to Hypothesis Testing, please purchase one of the following:

Calculating the Probability of Type II Error

Length: 18 minutesAuthor: JasonComplexity: Hard

Calculating Beta (the probability of making a Type II error) is one of the most challenging problems you'll face on the final exam. In this video I'll run you through the many steps involved.

To access all lessons in Chapter 11: Introduction to Hypothesis Testing, please purchase one of the following:

Probability of Type II Error – Two Tailed Example

Length: 16 minutesAuthor: JasonComplexity: Hard

With a two tailed (=,≠) hypothesis test there are two rejection regions. This adds an extra step to finding Beta. I'll show you here how to handle this variation of a Type II error calculation here.

To access all lessons in Chapter 11: Introduction to Hypothesis Testing, please purchase one of the following: