> the only way to make it statistically relevant is getting more answers from the no-show group. You can't get answers from the no-show group, because they don

> the only way to make it statistically relevant is getting more answers from the no-show group. You can't get answers from the no-show group, because they don't respond! You are just creating three groups instead of two: those who responded on the first try, those who responded on the second try, and those who don't respond at all.