Dear all, I am a little bit confused because of the returned p-value by summary.lm and also summary.rq I thought if the pvalue is <= 0.05 the difference is significant. But the R help says it is a two-sided pvalue. So does that mean the pvalue has to be <= 0.025 and >= 0.975? Best, Laura -- View this message in context: http://r.789695.n4.nabble.com/two-sided-p-value-tp3909277p3909277.html Sent from the R help mailing list archive at Nabble.com.
two-sided p-value?
2 messages · Laura, Uwe Ligges
On 16.10.2011 13:08, Laura wrote:
Dear all, I am a little bit confused because of the returned p-value by summary.lm and also summary.rq I thought if the pvalue is<= 0.05 the difference is significant. But the R help says it is a two-sided pvalue. So does that mean the pvalue has to be <= 0.025 and>= 0.975?
And at the same time. ;-) Actually, the hypothesis is a two sided one, the p-value should still be smaller than your predefined alpha that may or may not be 0.05. If that is not yet clear, you should really ask for local statistical advice or start reading yourself some statistics textbooks. Best, Uwe Ligges
Best, Laura -- View this message in context: http://r.789695.n4.nabble.com/two-sided-p-value-tp3909277p3909277.html Sent from the R help mailing list archive at Nabble.com.
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