# Ch 39: Inference About a Mean

Use the following video lessons and quizzes to help you understand the uses of confidence intervals and hypothesis testing. Learn how to apply the central limit theorem and differentiate between biased and unbiased estimators.

## Inference About a Mean - Chapter Summary

Begin this chapter with a lesson showing you how the central limit theorem can be used to determine the probability of a sample mean. You can also find out how to calculate and interpret confidence intervals for expected values and estimate confidence intervals by determining the sample size. You'll learn the differences between biased and unbiased estimators as well.

Additional topics of instruction cover the uses of hypothesis testing to evaluate inferences made about data collected from observational studies or experiments. You can also study the impact of effect size on this process. Wrap up your study with lessons that illustrate the differences between type I and type II errors by describing their relationship to the null hypothesis. This chapter is designed to familiarize you with the following:

• The central limit theorem
• Confidence intervals
• Biased and unbiased estimators
• Hypothesis testing

Let our informed and experienced instructors help you explore methods used to analyze statistical data with the lessons included in this chapter. The short instructional videos feature tags you can use to navigate between the main ideas discussed by our instructors. There are also matching transcripts if you'd prefer to access content in a different format. Both materials can prepare you for the multiple-choice questions included at the end of each lesson. These might prove useful if you're looking to confirm your understanding of the lesson topics or chart your progress through the course.

7 Lessons in Chapter 39: Inference About a Mean
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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