From jari.oksanen at oulu.fi  Wed May  7 16:17:00 2014
From: jari.oksanen at oulu.fi (Jari Oksanen)
Date: Wed, 7 May 2014 14:17:00 +0000
Subject: [Rd] historical significance of Pr(>Chisq) < 2.2e-16
In-Reply-To: <536A3CE8.2010909@yorku.ca>
References: <536A3CE8.2010909@yorku.ca>
Message-ID: <66C03CD1145C95448A4D73676DD9C2ED010E73BE@nippu1.univ.yo.oulu.fi>

See ?format.pval

cheers, jari oksanen
________________________________________
From: r-devel-bounces at r-project.org [r-devel-bounces at r-project.org] on behalf of Michael Friendly [friendly at yorku.ca]
Sent: 07 May 2014 17:02
To: r-devel
Subject: [Rd] historical significance of Pr(>Chisq) < 2.2e-16

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
 >

--
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
4700 Keele Street    Web:   http://www.datavis.ca
Toronto, ONT  M3J 1P3 CANADA

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[Rd] historical significance of Pr(>Chisq) < 2.2e-16
Jari Oksanen