1. Prediction 2. Experiment design 2.1 control group (no variables for comparison) 2.2 experiment group (has both of the variables) 3. Use model (it is possible to study the actual phenomenon)
1. Prediction2. Experiment design 2.1 control group (no variables for comparison) 2.2 experiment group (has both of the variables)3. Use model (it is possible to study the actual phenomenon)