Choosing a statistical test Flashcards
1
Q
what is a statistical test
A
used in psychology to determine whether a significant difference or correlation exists
2
Q
what is a sign test
A
- statistical test for a difference in scores between related items
- data should be at nominal level or better
3
Q
what are the levels of measurements
A
- nominal
- ordinal
- interval
4
Q
what is spearman’s rho
A
a test for correlation when data is ordinal level
5
Q
what is pearson’s r
A
parametric test for a correlation when data is at interval level
6
Q
what is wilcoxon
A
- a test for difference between two sets of scores
- data is ordinal
-using a related design
7
Q
what is mann whitney
A
- a test for a difference
between 2 sets of scores - data should be nominal level
- using an unrelated design
8
Q
what is related t - test
A
- parametric test for difference between 2 sets of scores
- data must be interval level
- related design
9
Q
what is unrelated t test
A
- parametric test for difference between 2 sets of scores
- data must be interval level
- unrelated design
10
Q
what is chi squared
A
- test for association (difference or correlation) between 2 variables or conditions
- data should be nominal
- unrelated design
11
Q
what is the acronym to remember the statistical test table
A
Carrots Should Come Mashed With Swede Under Roast Potatoes
12
Q
what factors are used to decide which statistical test to use
A
- whether the researcher is looking for a difference or correlation
- in the case of a difference what experimental design is being used
- the levels of measurement
13
Q
what are the 3 types of experimental designs
A
- related
- repeated measures
matched pairs - unrelated independent design
14
Q
what is nominal data
A
- data represented in the form of categories
- discrete (only one item can appear in one of the categories)
15
Q
A
