To avoid bias from parents who stopped having children after reaching a preferred sex ratio, the researchers did not count each woman’s final birth in the analysis.
Uhhhh, I’m no statistician, but doesn’t that introduce a bias into the statistics? It means that you (potentially, depending on behaviour) have fewer examples of balanced-sex families.
Yeah, I can see the bias they are trying to account for, but fail to see how excluding a birth from the statistics helps combat this in any way. Just because you stopped having kids doesn’t have any effect on the gender of your last kid.
Uhhhh, I’m no statistician, but doesn’t that introduce a bias into the statistics? It means that you (potentially, depending on behaviour) have fewer examples of balanced-sex families.
Yeah, I can see the bias they are trying to account for, but fail to see how excluding a birth from the statistics helps combat this in any way. Just because you stopped having kids doesn’t have any effect on the gender of your last kid.