Week 3 - Sources of Variation Flashcards
1
Q
What are confidence intervals?
A
Range of values that we can say with 95% confidence that the actual value will lie in-between this range.
2
Q
How to calculate error factor for: Incidence rates Prevalence Incidence rate ratio Standardised mortality rate
A
e^ 2(1/d)^0.5 - (d is events observed in a population)
e^ 2(1/d)^0.5
- d is events observed in a population
3
Q
What is variation caused by? How are these variations allowed for?
A
A difference in observed and actual value. Error factor produced,moron which confidence values are produced.
