T-tests Flashcards
1
Q
Generic t-test equation
A
(observed difference between sample means - expected difference between population means ) / estimate of standard error of the difference between the sample means
2
Q
What does a small sample result in? (distribution)
A
Flatter
3
Q
What does a larger t value mean?
A
Bigger difference
4
Q
What does a one sample t test do?
A
Compares a mean to a single value e.g. population mean
5
Q
Independent t-test does…?
A
Compares means from independent sources
6
Q
Dependent t-test does…?
A
Compares the means for within ppts
7
Q
Which t-test is most powerful?
A
Dependent because it has the least variance
8
Q
Assumptions for t-test
A
interval scale data, random sampling, normal distribution, equality of variance