IQ of 8～10 yo children in Chinese provinces

[NJ Brazen_3133]

Originally Posted by Bettafish

Yes. But most provinces do not have that problem, as shown in the table. So data from those provinces directly reveals something more. Understand, General Cannot-see-obvious?

What ?

So some provinces dont have a malnourishment issue, and do score higher on tests?

[Bettafish]

Originally Posted by NJ Brazen_3133

What ?

So some provinces dont have a malnourishment issue, and do score higher on tests?

Those provinces have a great VARIANCE from each other, which cannot be explained by iodine alone.
Their range of averages is from 90s to 110s, even though the children do not lack iodine.

Also, you can see in some provinces, the distribution of IQ is far from normal/Gaussian. Therefore either the test does not fit them, or the sample has some problem.

[NJ Brazen_3133]

Originally Posted by Bettafish

Those provinces have a great VARIANCE from each other, which cannot be explained by iodine alone.
Their range of averages is from 90s to 110s, even though the children do not lack iodine.

Also, you can see in some provinces, the distribution of IQ is far from normal/Gaussian. Therefore either the test does not fit them, or the sample has some problem.

in your OP you said the low iodine affected the children scores right? You did say that right?

[Bettafish]

Originally Posted by NJ Brazen_3133

in your OP you said the low iodine affected the children scores right? You did say that right?

A lot of things can be observed. It serves many purposes.