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Is my IV manipulating what I want it to manipulate?
Is my DV measuring what I want it to measure?
The likelihood that you obtain the observed result (or a result more extreme), given the null hypothesis is true
Measure of variability due to my effect divided by variability in my sample. P-value says nothing this. Different statistics have different measures of it.
The bigger the difference between means, the bigger the effect size. The bigger the SD is, the smaller the effect size
Advantages: fewer subjects, more statistical power
Disadvantages: longer experiments, counterbalancing, carryover effects
More than 2 groups to be compared.
F = -------------------
Comparisons of means after finding a significant F.
Used when I have no hypothesis about how the means might differ from each other (2-tailed).
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