Timeline for example where comparison of three mean anova and t-test have different results
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Mar 21, 2014 at 13:31 | vote | accept | Donbeo | ||
| Mar 21, 2014 at 1:53 | comment | added | Underminer | Yes, I had to change the seed a good many times to get the desired results and the lowest t-test p-value is usually a good bit lower than the F-test p-value. | |
| Mar 20, 2014 at 22:53 | comment | added | Donbeo | so I suppose that if I run this code with random seed a lot of time I will get more error using the 3 t-test and less error using anova? | |
| Mar 20, 2014 at 21:11 | comment | added | Greg Snow |
As an additional note, if you do p.adjust( c(0.3803, 0.3577, 0.03746) ) in R then you see adjusted p-values that are more in line with the Anova result. Just confirms that this is an example of inflated alpha from multiple comparisons.
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| Mar 20, 2014 at 20:49 | history | edited | Underminer | CC BY-SA 3.0 |
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| Mar 20, 2014 at 20:31 | history | answered | Underminer | CC BY-SA 3.0 |