Statistics Flashcards
1
Q
What is unpaired T test?
A
Tests the null hypothesis that the population means related to two independent, random samples.
Example is test subjects that have been randomised into two groups and have received different medication so they are independent samples.
2
Q
Formula for number needed to treat NNT?
A
Number of people that need to receive the treatment in order to benefit.
NNT = 1/absolute risk reduction
Absolute risk reduction = control group incidents - new intervention group incidents
3
Q
When is Chi-squared test used?
A
Usually used in Yes No studies.
