Statistical Tests Flashcards
What is a type 1 error?
False positive - when researchers conclude that an effect is real, but it’s actually not
What is a type 2 error?
False negative - when researchers conclude there is no effect, but there actually is a real effect
What are the 3 Ds?
Design
Data
Difference
What is nominal data?
Tallies of discrete categories (e.g. breeds of dog: 8 pugs, 2 poodles etc.)
What is ordinal data?
Whole numbers that can be ordered (e.g. ranking your mood on a scale of 1-10)
What is interval data?
Standardised units of measurement (e.g. kg, cm, seconds)
Which experimental designs are related?
Repeated measures
Matched pairs
Which experimental design is unrelated?
Independent groups
Which stats test would you use for nominal data from an unrelated experimental design?
Chi-squared
Which stats test would you use for nominal data from a related experimental design?
Sign test
Which stats test would you use for nominal data from correlation?
Chi-squared
Which stats test would you use for ordinal data from an unrelated experimental design?
Mann-Whitney
Which stats test would you use for ordinal data from a related experimental design?
Wilcoxon
Which stats test would you use for ordinal data from a correlation?
Spearman’s Rho
Which stats test would you use for interval data from an unrelated experimental design?
Unrelated t-test
