stats

Question 1

relative risk ratio
-probability of event occurring
-shows strength of association b/w exposure and disease

Answer 1

RR = 1 means no difference b/w groups
RR < 1 means risk of bad outcome decreased
RR > 1 means risk of bad outcome increased

Question 2

odds ratio
estimates RR

Answer 2

OR >1 means frequency of exposures higher among cases
always overestimate the RR

Question 3

null hypothesis

Answer 3

prediction that observed differences due to chance
a statement of no difference

Question 4

alt hypothesis

Answer 4

prediction that observed differences are due to controlled variables and the difference is statistically significatn