Variation, Bias And Confounding Flashcards
1
Q
What are the 2 types of biasing
A
Selection and information
2
Q
What is election bias
A
Errors due to difference in way groups were collected
3
Q
What is information bias
A
Errors due to misclassification
4
Q
Give 3 examples of information bias
A
Recall, observer and measurement
5
Q
What is a 95% confidence intervals
A
Range that is likely to contains the mean of population values 95% of the time
6
Q
What are confidence intervals an estimate of
A
Precision of observed values in the sample
7
Q
WHat leads to an increase in confidence intervals
A
Smaller sample and increased variation
8
Q
What is a confounding factor
A
Something associated with both the outcome and exposure of interest and helps account for the outcome
9
Q
What 2 methods overcome confounding variables
A
Direct and indirect standardisation
