Would note that the report found 21% reduced risk of infection in required mask use for students vs optional. Not considered statistically significant because the confidence interval included 1.0. (CI was 0.50 - 1.08)
One could argue that an increased sample size would yield a statistically significant result, and on the flip side another could argue that the effect size would be minimal if you need a larger sample size.
The rebuke, of course, is that even one extra case could kill a loved one that the kid would spread disease on to.
Personally, perhaps reframing the argument that one should wear a mask at school so that they shouldn't have to wear one at home would be a more compelling argument, but I suspect many would disagree..
One could argue that an increased sample size would yield a statistically significant result, and on the flip side another could argue that the effect size would be minimal if you need a larger sample size.
The rebuke, of course, is that even one extra case could kill a loved one that the kid would spread disease on to.
Personally, perhaps reframing the argument that one should wear a mask at school so that they shouldn't have to wear one at home would be a more compelling argument, but I suspect many would disagree..