# Lesson 9: The Diversity of Samples

*Assignments *

- Complete the 'Poll Monday' and 'Thinking Tuesday' Activities for Lesson 9.
- Read section 3 of Chapter 17 and Chapter 19.
- Work through the Lesson 9 online notes that follow.
- Complete the Practice Questions and Lesson 9 Assignment.

*Learning Objectives*

After successfully completing this lesson, you should be able to:

- Identify and avoid the gambler's fallacy.
- Understand the concept of a sampling distribution and how it relates the population parameter to the sample statistic.
- Apply the normal approximation to sample proportions and means.
- Examine real-world problems and decide when the normal approxiamtion does and does not apply.

*Terms to Know*

*click on the terms to learn more*