Biostatistics Cheat Sheet Flashcards
If The…
Sample size decreases
… it will…
Make the study require less resource to perform
If The…
Sample size increases
… it will…
Increased the power
If The…
Power increases
… it will…
Make result more reliable
If The…
Confidence intervall narrows
… it will…
reduce uncertainty
If The…
P-value gets smaller
… it will…
Reduce likelihood outcomes occured by chance
If The…
Standard deviation gets smaller
… it will…
Imply reduced variability in the sample
If The…
Data is not normally distributed
… it will…
Not allow for parametric tests to be used
If The…
Odds ratio is <1
… it will…
Make the outcome less likely in the intervention group
If The…
relative risk is <1
… it will…
Suggest a negative association between the intervention group
If The…
ARR
(Absolute Risk Reduction)
becomes less
… it will…
Mean the intervention is less meaningful
If The…
Alpha increases
… it will…
Increase the change of a type 1 error
If The…
Beta increases
… it will…
Increase the chance of a type 1 error
If The…
Study has extreme outliers
… it will…
Not impact the median as much as it would impact the mean
When the…
Data is being produced by a project is intended to contribute to generalizable knowledge
… it means…
It is research project
When the…
Study poses any threat to human subject
… it means…
IRB approval is required
When the…
Conclusion is that there is a difference when theres actually no difference
… it means…
Type I error
When the…
Conclusion is that theres is no difference when there actually is a difference
… it means…
Type II error has occured
When the…
Study subjects alter their behaivior due to awareness of being in the study
… it means…
The Hawthorne Effect is occuring
When the…
Subjects remembers an event different from how it occured
… it means…
Recall bias
When the…
Study design is not consistent with standarn clinical practices
… it means…
The study has limited external validity
When the…
Study is observational in design
… it means…
There is no intervention group
When the…
Study is a snapshot of a population at one point in time
… it means…
It is a cross-sectional group
When the…
Design is a case-control study
… it means…
It is an observational study
When the…
Use of multivariate logistical regression is employed
It mean….
independent variables can be identified
