t-test Flashcards
1
Q
what is a t-test used for?
A
to find if there is a significant difference in the means of two data sets
2
Q
what is the null hypothesis in a t-test?
A
there is no significant difference between x or y
therefore it is due to chance
3
Q
steps for t test
A
find means for both data
find variance for both data
use equation
4
Q
degrees of freedom in t-test
A
(total n of both sets) - 2
5
Q
if critical value > t-test value
A
you cannot reject the null hypothesis
can be due to chance
6
Q
if critical value < t-test value
A
you reject the null hypothesis
cannot be due to chance
