Dear list members, I have a statistical question, that doesn't belong to this list, and I apologise for that in advance but I would appreciate your help very much. Is there some convention for selecting the a level for significance testing in scientific (e.g. chemical processes) studies? Most people use the 0.05 level but I could not find a reference to justify this. Why not 0.01 or 0.1? Montgomery in his book "Design and Analysis of Experiments" disagrees with setting a priori acceptable levels at all. Is it necessary to set a limit for significance testing since R can provide exact probability levels for the significance of each effect?
Thanks in advance. Kyriakos Kachrimanis. ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
