Is there any statistical solution to test if a single subject belongs to a group?

#1
Question to ask: Does a single subject A belong to a group B?
For each individual in the group B and A, there are some measures (for example, 14 non-independent measures) to characterize the subject.

Any thought is welcome, thanks!
 

hlsmith

Omega Contributor
#2
Yes, this seems like a classification problem. So if you want to see if a single subject belongs to one of two groups and you have a bunch of other subjects where you know which group they are in (labels), you can just 'score' the single subject.

The simplest thing would be to create a logistic regression model with outcome variable A or B and use the model coefficient to get a probability of the single subject being in either group. Though, you don't have to use logistic regression since all you want is a probability. So you could probably also use support vector machines, random forest, gradient boosted trees, or perhaps neural networks -> any classifier.