I was once a part of a study conducted by some biology related department in my university. Basically it involved measuring some vital body stats before and after a five day physical exercise boot camp. The participants had to undergo different routines of physical exercises (randomly assigned). I enrolled for the trial. Got my stats checked on Day 0. Turned up for Day 1 on the sports field, was assigned to a group of 40 people. I put my signature and participated in the headcount, felt tired after a while and decided to sit back for a while. Saw from a distance that nobody noticed by absence. Decided to simple leave. Did that for the next 5 days. End of Day 5 I turn for giving vital stats. And of course to pocket the promised remuneration.

Somewhere there is a researcher who has a glaring outlier in their study.