The best replacement for randomized experiment is observational study.

The best alternatives to randomized experiment are rated as following:
★★★★★  observational study
★  an observational study

Your alternative for randomized experiment is not listed? Suggest!


No companions for randomized experiment have been suggested so far.
You have in mind a companion for randomized experiment and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of randomized experiment in all years. Click on graph for more.
randomized experiment
observational study
an observational study