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assumption of normality

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1 results

7 - Is This Normal?
from Part II - How to Use Statistics
Paul Cairns, University of York
Book:

Doing Better Statistics in Human-Computer Interaction

Published online:

26 January 2019

Print publication:

07 February 2019, pp 86-94
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Summary

Many statistical tests that are commonly used rely on the assumption that data are normally distributed. This chapter discusses why normality commonly occurs in statistics but also how, in many practical situations in HCI, it is not safe to assume normality. It also shows how tests for normality are not meaningful or useful. Instead, where normality is in doubt, analysis should be more careful and use suitable alternative tests.