Statistics Flashcards
student’s t test
normal distribution
to test a null hypothesis
compares the means of two sample data
x2 test
compares categorical data
mann-whitney U test
non-parametric version of t test.
compares two sample data but no stipulation regarding distributions
fisher
2 x 2 tables of categorical data
ANOVA
3 or more categories
Odds ratio
comparing the odds of something happening in each group. If 1 = same likelihood in both groups
Relative risk
compares the likelihood of something happening in each group. If 1 = same likelihood in both groups
standard error of the mean
SEM = standard deviation divided by the square root of the sample size
perinatal mortality rate
stillbirth and death in first week per 1,000 live births
maternal mortality rate
direct and indirect deaths per 100,000 pregnancies
maternal death timing
in pregnancy or up to 42 days afterwards
standard deviation is
square root of the variance
sensitivity
TP/TP+FN
specificity
TN/TN+FP
PPV
true pos/true pos+false pos
