T test Flashcards
1
Q
What does the T test do
A
compares means from 2 independent samples, allows calculation of difference and confidence interval for the difference
2
Q
Assumptions of the t test
A
continuous data, normally distributed
Variances are the same
3
Q
What if the assumptions of the t test do not hold
A
stat test is dubious and p value may be wrong
4
Q
How is the degrees of freedom calculated for unpaired t test
A
n1+n2-2
5
Q
T test null hypothesis
A
there’s no sufficient evidence to conclude that there is a difference between A and B?
