Just as a warning, while the book mentions multiple comparisons, it's possible to read the book in such a way that one would skip that section.
The section called "A Valuable Lesson" does show that doing multiple tests with the same threshold of P<0.05 does cause inexistant effects to be reported as statistically significant, but the section on correcting for that is present much later in the section about ANOVA.
That's actually a pretty severe flaw, especially for a handbook that is likely to be read partially.
The section called "A Valuable Lesson" does show that doing multiple tests with the same threshold of P<0.05 does cause inexistant effects to be reported as statistically significant, but the section on correcting for that is present much later in the section about ANOVA.
That's actually a pretty severe flaw, especially for a handbook that is likely to be read partially.