Stats Flashcards
RR definition
Risk of an outcome in a group exposed divided by risk of an outcome in a group unexposed
RRR (relative risk reduction) Definition
1-RR
True positive rate definition
Sn
False positive rate definition
1-Sp (aka FP / (FP+TN))
Positive likelihood ratio
Sn / (1-Sp)
Negaitve likelihood ratio
False negative rate / True negative rate (1-Sn) / Sp
Interval, 2 independent groups
Unpaired t
Interval, 2 dependent groups
Paired t
Interval, >=3 independent groups
ANOVA
Interval, >=3 dependent groups
Repeat measures ANOVA
Interval, Correlations
Linear regression / correlation coefficient
Ordinal, 2 independent groups
Mann-Whitney
Ordinal, 2 dependent groups
Wilcoxan Rank Sum
Ordinal, >=3 independent groups
Kruskal-Wallis
Ordinal, , >=3 dependent groups
Friedman
Ordinal, Correlations
Spearman’s Rank
Nominal, 2 independent groups
Chi-square (or Fisher)
Nominal, 2 dependent groups
McNamear
Nominal, >=3 independent groups
Chi-Square
Nominal, >=3 dependent groups
Cochrane Q
Nominal, Correlations
Pearson’s correlation
Calculate SEM
SD / sqrt (n)
Define SD and SEM
SD = Variability of data around the mean SDM = how much variability of means from different samples