[isolli]

Yes, this immediately reminded me of this book. To add an example (from the book): after implementing turn-on-red in a few places, a study was conducted to check if it increased the rate of accidents. The study found no statistically significant effect, so turn-on-red was rolled out statewide. Unfortunately, the study failed to detect an effect not because there was no effect, but because the sample was too small to confirm that the effect was statistically significant. Now that we have more data, it turns out that turn-on-red does increase the rate of accidents.

Read it in full here: https://www.statisticsdonewrong.com/power.html#the-wrong-tur...