Wrong results from anova
It is a printing problem - the default number of digits in print.summary.aov
is max(3L, getOption("digits") - 3L). Set options(digits=7) instead of
your current 6 (?) or try print(summary(fit.Y), digits=7) to see more
digits.
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Tue, Apr 14, 2015 at 10:23 AM, li li <hannah.hlx at gmail.com> wrote:
Hi all,
I have following data. When I perform an anova, the residual sum of
square returns to be zero.
But this is wrong, since we can hand calculate the RSS to be around 0.0308.
Did anyone come across the same problem before? Any suggestions?
Thanks.
Hanna
ydata
Y sample.Y 1 0.477 0.5 2 0.477 0.5 3 0.478 0.5 4 27.320 27 5 27.420 27 6 27.300 27 7 29.440 29 8 29.620 29 9 29.610 29 10 35.840 35 11 35.900 35 12 35.850 35
fit.Y <- aov(Y~sample.Y, data=ydata) summary(fit.Y)
Df Sum Sq Mean Sq F value Pr(>F)
sample.Y 3 2203 734.2 190706 <2e-16 ***
Residuals 8 0 0.0
---
Signif. codes: 0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
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