Research Methods A2 L9 - 12 Flashcards
1
Q
Type 1 error:
A
- Rejected null hypothesis and accepted experimental hypothesis
- However, the results are actually due to chance rather than statistical significance
2
Q
Type 2 error:
A
- Rejected experimental hypothesis and accepted null hypothesis
- However, the results are due to statistical significance rather than chance
3
Q
What are levels of measurement used for?
A
Categorise data into one of 3 types
4
Q
What are the 3 types of data?
A
- Nominal
- Ordinal
- Interval
5
Q
Nominal data:
A
- Organised into categories
- Fit in one category only not the other
6
Q
Ordinal data:
A
- Can be placed in rank order
- Can consist of measurements eg height
7
Q
Parametric tests
A
- More robust and powerful
- Based on actual data collected rather than rank order
- More likely to detect significance
8
Q
What are the 3 parametric tests?
A
9
Q
What 3 factors mean a parametric test can be conducted?
A
- Level of measurement must be interval
- Data must form a normal distribution
- Data should have similar variance of scores
10
Q
What are the 4 non-parametric tests?
A
- Chi Squared
- Spearman’s Rho
- Mann Whitney
- Wilcoxon
11
Q
What 3 questions should be asked when deciding the test that should be used?
A
1) Does the research involve a correlation, a test of difference or an association?
2) Which research design is being used?
3) What level of measurement is being used?
12
Q
Correlation, ordinal:
A
Spearman’s rho
13
Q
Correlation, interval:
A
Pearson’s r
14
Q
Association:
A
Chi squared
15
Q
Test of difference, independent measures, nominal:
A
Chi squared
