so should have learned stats...

ECHIDNE OF THE SNAKES: "Let's not go quite that fast. I looked at the original research summary, and what it states is that weeks worked by the mother had no correlation with childhood obesity. So when moms work, kids don't get fat. Get it? What the study did demonstrate was that childhood obesity was positively associated with mothers who work long hours per week, and only then for the educated white mothers, and that is the percentage Harford chooses to cite in his article. There was no relationship between childhood obesity and working hours for the black or Hispanic mothers. It might be worthwhile to dig out the sample numbers here. How many white and educated mothers did the study include?Let's not go quite that fast. I looked at the original research summary, and what it states is that weeks worked by the mother had no correlation with childhood obesity. So when moms work, kids don't get fat. Get it? What the study did demonstrate was that childhood obesity was positively associated with mothers who work long hours per week, and only then for the educated white mothers, and that is the percentage Harford chooses to cite in his article. There was no relationship between childhood obesity and working hours for the black or Hispanic mothers. It might be worthwhile to dig out the sample numbers here. How many white and educated mothers did the study include?"