September 2019
Beginner
236 pages
5h 33m
English
Content preview from A Gentle Introduction to Statistics Using SASⓇ Studio
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Chapter 8: Two-Sample Tests
Getting an Intuitive Feel for a Two-Way t Test
Unpaired t Test (t Test for Independent Groups)
Describing a Two-Sample t Test
Nonparametric Two-Sample Tests
Introduction
There are two classes of two-sample tests that you will see in this chapter. One is an unpaired t test (also called a t test for independent groups) that is used to compare means between two groups. The other type of two-sample t test is a paired t test. Commonly, a paired t test is performed when each subject is measured twice, typically before and after some treatment. It can also be used when experimental units are paired on certain characteristics such as gender and age before the experiment, ...