Statistics Flashcards
1
Q
Chi squared tests
A
Compare proportion between two groups
only used to compare categorical measures
measures are only comparable at FIXED time point
if time range given, pick lowest time point as this is last possible time that ALL patients will be followed up
2
Q
Type 2 Error
A
also known as Beta error
null hypothesis is incorrectly accepted
FALSE negative
given risk that significant difference is not detected even though there is one
3
Q
Type 1 error
A
also known as alpha error
incorrect rejection of true null hypothesis
FALSE positive
risk of detecting a tx difference when there is none
