T-tests

Question 1

Generic t-test equation

Answer 1

(observed difference between sample means - expected difference between population means ) / estimate of standard error of the difference between the sample means

Question 2

What does a small sample result in? (distribution)

Answer 2

Flatter

Question 3

What does a larger t value mean?

Answer 3

Bigger difference

Question 4

What does a one sample t test do?

Answer 4

Compares a mean to a single value e.g. population mean

Question 5

Independent t-test does…?

Answer 5

Compares means from independent sources

Question 6

Dependent t-test does…?

Answer 6

Compares the means for within ppts

Question 7

Which t-test is most powerful?

Answer 7

Dependent because it has the least variance

Question 8

Assumptions for t-test

Answer 8

interval scale data, random sampling, normal distribution, equality of variance