[digitalzombie]

It's just statistic.

How you collect your data can introduce bias and statistic have a whole range of topics on how to collect data without introducing bias and systematic techniques to sample data. Stratifying data if a certain group is under represented, random sample, etc... Survey analysis goes into hardcore details on how to sample a population to accurately do inference and it's an interesting statistic sub field if anybody is interested.

ML tends to be more here's the data already do something with it.

Statistic encompass everything about the data including how to sample, collect the data, and designing the experiment to collect the correct data to answer your hypothesis. Where as ML is usually here's the data, go figure out what you can get out of it.