Lesson 9: The Diversity of Samples

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  • 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

  • population parameter (e.g. population proportion, population mean)
  • sample statistic (e.g. sample proportion, sample mean)
  • sampling distribution
  • frequency curve (probability histogram)