Tukey Multiple Comparison Test P Value. Sep 14 2020 Step 2. Further Tukeys procedure adjusts the p-values for multiple testing so that the family-wise error rate is controlled probability to get at least one false positive among the family of tests.
Report multiplicity adjusted P value for each comparison. 1 - ptukey 4059 sqrt 2 3 62 1 00004082944. For multiple comparisons so when doing lots of comparisons this makes Type I errors likely Generally prefer to have strongly significant F-test say p-value.
You do not need to rely on a significant p-value in the ANOVA table to reduce the chance of detecting a difference that doesnt exist.
Sep 07 2018 As before ANOVA reports a p-value far below 005 indicating there are differences in the means in the groups. Jul 27 2020 The p-value from the ANOVA table is 0000588. P adj is the p-value adjusted for multiple comparisons using the R function TukeyHSD. 1 - ptukey 40585.
