Biostat Formulas Flashcards
1
Q
Standardized data formula (z)
A
x- mean/ standard deviation=z
2
Q
95% CI formula of mean
A
(Mean-0.96) x SE
(Mean+0.96) x SE
3
Q
Sample proportion
A
X/n
Outcome / sample size
4
Q
Standard deviation of sample proportion
A
Square root of sample proportion * (1- standard proportion)
5
Q
Standard error of standard proportion
A
Square root of: standard error * (1-standard error)/ sample size
6
Q
95% fi for proportion
A
Sample proportion + 1.96 * SE
Sample proportion - 1.96 * SE
