From friendly at yorku.ca  Wed May  7 16:02:16 2014
From: friendly at yorku.ca (Michael Friendly)
Date: Wed, 07 May 2014 10:02:16 -0400
Subject: [Rd] historical significance of Pr(>Chisq) < 2.2e-16
Message-ID: <536A3CE8.2010909@yorku.ca>

Where does the value 2.2e-16 come from in p-values for chisq tests such 
as those
reported below?

 > Anova(cm.mod2)
Analysis of Deviance Table (Type II tests)

Response: Freq
LR Chisq Df Pr(>Chisq)
B 11026.2 1 < 2.2e-16 ***
W 7037.5 1 < 2.2e-16 ***
Age 886.6 8 < 2.2e-16 ***
B:W 3025.2 1 < 2.2e-16 ***
B:Age 1130.4 8 < 2.2e-16 ***
W:Age 332.9 8 < 2.2e-16 ***
---
Signif. codes: 0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
 >

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Michael Friendly     Email: friendly AT yorku DOT ca
Professor, Psychology Dept. & Chair, Quantitative Methods
York University      Voice: 416 736-2100 x66249 Fax: 416 736-5814
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[Rd] historical significance of Pr(>Chisq) < 2.2e-16
Michael Friendly