To be fair, this wasn't an A/B test. If it was actually an A/B test, he would be isolating one variable against a control. In this case, the variable he didn't

To be fair, this wasn't an A/B test. If it was actually an A/B test, he would be isolating one variable against a control. In this case, the variable he didn't control was time - maybe he made $5 on the day he wore jeans because the weather was bad or because he scowled at customers. To be fair to the kid - 1) He's probably right about dressing the part. I wonder if he optimized; is a suit the best way to dress to increase Lemonade sales? 2) It's REALLY hard to isolate variables in this type of marketplace, even for corporations. So, in lieu of a side by side A/B test, what he did shows a lot of forethought for a teenager.