OK, thanks for the analysis, I would have assumed that 1,000+ in each arm was enough to show something if something was there but guess I didn’t take into account the rarity of childhood mortality. Soz.
Yup. The way in which sample size matters is that it decreases the size of the confidence intervals, but there are other things that affect that as well. So the best way to tell whether the sample size is large enough is looking at the confidence intervals directly.
OK, thanks for the analysis, I would have assumed that 1,000+ in each arm was enough to show something if something was there but guess I didn’t take into account the rarity of childhood mortality. Soz.
Yup. The way in which sample size matters is that it decreases the size of the confidence intervals, but there are other things that affect that as well. So the best way to tell whether the sample size is large enough is looking at the confidence intervals directly.