How do we know if the experimental results are different due to the treatments or if the difference occurred purely by chance? 1. Below is a diagram that details how one group conducted an experiment to test if the long or short putter was better. Use the diagram to describe how the experiment was conducted. Group 1 10 Students Treatment 1 Long Putter 20 randomly selected seniors Random Assignment Compare mean distance from hole Page Group 2 10 Students Treatment 2 Short Putter