Stats Flashcards
1
Q
Likelihood ratio (positive result) ie increase in odds of having disease as result of positive test
A
Sensitivity / (1 - specificity)
2
Q
Likelihood ratio for negative test - ie odds reduction as result of negative test
A
(1 - sensitivity) / specificity
3
Q
Normal distribution - what % of values lie within what SD of the mean
A
68% of values within 1 SD
95% of values within 2 SD
4
Q
Power calculation
A
1 - type 2 error
Ie 1 - chance of missing something
