Summary
Contents
Subject index
Bruce Frey’s There’s a Stat for That! is a brief, straightforward, and to-the-point guide to deciding which statistical analysis to use and when to use it. Designed for consultants, researchers, students, and those who already have the resources to tell them how to perform the analyses, this text explains why a particular statistical approach is the right one to use. The book affirms that regardless of the group design, once the variables are chosen and the measurement strategy is worked out, one can rest assured that there is a stat for that!
Group Comparisons
A popular research strategy is to compare groups of people. The idea is to create groups that represent different levels (or values or scores) of an independent variable. Everyone in the group has the same score on the independent variable. So, if the groups differ on some dependent variable, then that shows there’s a relationship between the independent and dependent variable.
A lot of the really famous statistics, like t tests and analyses of variance, compare group means to determine significance. Those mean comparison statistics work on the assumption that the dependent variable is at the interval level and, therefore, is normally distributed in the population. That’s how they can be so precise and powerful. We don’t tend to teach about all ...
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