April 2017
Intermediate to advanced
560 pages
20h 58m
English
book
Research Methods in Human-Computer Interaction, 2nd Edition
by Jonathan Lazar, Jinjuan Heidi Feng, Harry Hochheiser
Content preview from Research Methods in Human-Computer Interaction, 2nd Edition
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Chapter 4
Statistical analysis
Abstract
Statistical analysis is a powerful tool that helps us find patterns and differences in the data as well as identify relationships between variables. The nature of the data collected and the design of the study determine the appropriate significance test that should be used. If the data are normally distributed and scaled at intervals, parametric tests are appropriate. Otherwise, nonparametric tests should be considered. Various statistical methods are available for comparing the means of multiple groups. This chapter introduces different types of t tests and ANOVA tests as examples of commonly used parametric tests for comparing means. Examples of nonparametric tests (e.g., the Chi-square test, the Mann-Whitney ...
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