RDS

Question 1

Discrete comparison

Answer 1

Chi squared

Question 2

Discrete correlation

Answer 2

chi squared

Question 3

non-normal continuous correlation

Answer 3

Spearman

Question 4

normal continuous correlation

Answer 4

pearson

Question 5

continuous normal one variable more than two groups comparison

Answer 5

ANOVA

Question 6

continuous normal comparison with two groups

Answer 6

t test, paired or unpaired

Question 7

Not normal continuous comparison with more than two groups

Answer 7

kruskal wallis

Question 8

not normal continuous comparison with two paired groups

Answer 8

wilcoxon

Question 9

not normal continuous comparison with two independent groups

Answer 9

mann whitney

Question 10

types of data

Answer 10

categorical, ordinal is ordered nominal isn’t

quantitative discrete or continuous

Question 11

Normal distribution terms

Answer 11

kurtosis = tail heaviness
skewness = symmetry
gaussian = perfect

Question 12

assessing normality

Answer 12

more than fifty = kolmogorov-smironov

less shapiro wilks

Question 13

hierarchy of evidence

Answer 13

meta analysis and systematic review
randomised control
welldesigned control
case control
descriptive shit
casereport

Question 14

measures of averages

Answer 14

normal = mean
non-normal = median and mode

Question 15

rrr

Answer 15

relative risk reduction, probability decrease after lifestyle change

Question 16

RR

Answer 16

Relative risk, used to estimate strength of association between treatments/risk factors and outcomes. Tests significance between groups, ie. disease vs control or drug vs placebo.

Question 17

Contingency table formulae

Answer 17

RR= (A/A+B)/(C/C+D), over one means positive association, less than one means negative association
OR= odds of something occurring with exposure, vs odds without exposure
odds of exposure with outcome / odds of exposure in people without outcome