What’s a logistic regression?

Question

What’s a logistic regression?

In: 2

Answer 1

a regression trying to predict probability of an event. E.g. person finding a job, or defaulting on their debt.

Dependent variable (Y) is 0 or 1 depending on whether even actually happened.

You do not want to use linear regression on such data, since predictions can be above 1 or below 0, i.e. above 100% or below 0% probability, which means you predict that event is guaranteed to happen (or not).

Logit function turns any number into a probability, strictly between 0% and 100%. This is a much better prediction, since you always allow for either thing to happen.