BioStat

Question 1

ARR

Answer 1

Control - treatment

(C / total) - (a / total)

Question 2

Power

Answer 2

= 1 - B

Ability to detect difference when one exists

B = probability of type two error.
Fail to reject null hypothesis when it is false

A = Type 1 error = reject null when it is really true.
Lower the A higher the type 1
Higher the confidence