Inferential Statistics

Question 1

What is a Parametric test?

Answer 1

1. Interval/ratio data
2. Normal distribution (not skewed)
3. Spread of data is not significantly large

Question 2

What is a test of correlation

Answer 2

A test that is looking for a relationship/association between at least 2 variables.

Question 3

What is the mnemonic for Inferential Statistics Tests?

Answer 3

C S C, M W S, U R P & NOIR

Carrots Should Come Roast With Swede Under Roast Potatoes.

Question 4

When should a Sign test be used?

Answer 4

-For nominal data (non-parametric)
-Test of difference
-Related design (repeated measures or matched pairs)

Question 5

What does a one-tailed or two-tailed test mean?

Answer 5

One-tailed = directional
Two-tailed = non-directional

Question 6

The difference between
correlations and experiments.

Answer 6

Controlled experiments establish causality, whereas correlational studies only show associations between variables