Flashcards in Biostats Deck (10)
Chi Square Test
Binary data, 4 diff groups
- what is expected for certain box? = row total X column total / grand total
If Standard Deviation is 0?
All observations are the same
What is an ordinal variable?
P < 0.05, what's the chances a mistake was made?
Data before/after with 1 group of participants?
2 independent groups, continuous variable?
Unpaired t-test (with n-2 degrees of freedom)
Confidence Interval equation?
CI = X + or - Z (SE)
*95% CI for mean, then Z = 2 SD's
*99% CI for mean, then Z = 3 SD's
P = 1 - beta
Type I error
Alpha: you Abserved a difference that didnt exist (rejected null when it is true)