Week 4 : RMB Flashcards
1
Q
When do you use a t-test?
A
To compare two group means
2
Q
What is an independent t-test?
A
Mean of group 1 - mean of group 2 / divided by the pooled standard error mean of the difference
3
Q
What does a large t-value mean?
A
The mean of group 1 is above the mean of group 2
4
Q
What is leavens test?
A
A significant value means the groups are likely to have different variances
5
Q
What is welches test?
A
uses the unpooled SEM of the difference , valid when there are two variances
6
Q
What is a paired sample test?
A
the mean of paired difference - 0 / divided by the SEM of paired difference
