# 28: Comparing Means


## Learning Objectives

• Describe the rationale behind the sign test
• Describe how the t-test can be used to compare a single mean to a hypothesized value
• Compare the means for two paired or unpaired groups using a two-sample t-test

We have already encountered a number of cases where we wanted to ask questions about the mean of a sample. In this chapter, we will delve deeper into the various ways that we can compare means.

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