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Flashcards in T test Deck (5)
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1

What does the T test do

compares means from 2 independent samples, allows calculation of difference and confidence interval for the difference

2

Assumptions of the t test

continuous data, normally distributed
Variances are the same

3

What if the assumptions of the t test do not hold

stat test is dubious and p value may be wrong

4

How is the degrees of freedom calculated for unpaired t test

n1+n2-2

5

T test null hypothesis

there's no sufficient evidence to conclude that there is a difference between A and B?