Statistics Flashcards
1
Q
Statistical test for >2 groups to be compared
A
Normally distributed - ANOVA
Not normal - non-parametric tests eg. Friedman, Kruskal-Wallis
2
Q
Statistical test for 1 group before and after an intervention
A
Normal distribution - paired T-test
Not normal - non-parametric Wilcoxon test
3
Q
Statistical test for 2 groups to be compared
A
Normal - unpaired T-test
Not normal - non-parametric Mann-Whitney
4
Q
Statistical test for qualitative data
A
Chi square test
5
Q
Sensitivity
A
True positive / All disease
a / a+c
6
Q
Positive predictive value
A
True positive / all positive
a / a+b
7
Q
What depends most on prevalence
A
PPV and NPV
