# Chapter 10: Testing Claims Regarding a Parameter

Let's take a minute to refresh the process of statistics we introduced earlier this semester.

Last chapter, we finally entered the "meat" of the course, where we use our knowledge of calculated statistics (like the sample mean and standard deviation) and our knowledge of probability (the normal distribution, et al) to come to conclusions - confidence intervals.

This chapter, we'll be expanding that knowledge and answering questions about population parameters based on sample data. For example:

- Do online students work more than traditional students?
- Are online students younger than the average ECC student?
- Do ECC students vote at a higher rate than the general population?