Questions tagged [z-test]

I have some sample data of customers and I am looking at the impact of consistent advertising (e.g. showing the same message) to see the impact of click through rates per session. The analysis shows an Uplift in click through where a consistent…

You have an ML model that outputs 100,000 out of a million observations of a dichotomous variable 0 or 1. You want to see whether the distribution of the outputted 100,000 observations of the model is similar to the 1 mil. You apply the model 3…

I am studying statistics on my own and I am not understanding when to use a one-sample t-test or a test with assuming a standard normal distribution. As I understand, both are comparing a population mean with a sample mean, so, when should I use…