Can an anon help me understand regression to the mean better?

>>128478671
no

>>128478671
Bring back any answers you may find while researching this. I'm interested.

two taller than average people will not have an even taller child, the childs height will regress towards the mean.
immigrants have traditionally been the best and brightest who want a better life in the West - their children, however regress toward the mean IQ of their race.
spics in America are a good example - generally the parents are hard working and the children are useless wastes of flesh.

>>128481125
I get that, but if there parents are of different race, what height does the child regress to? The average of the father's race? The average of the mother's race? The average of the two races combined?

>>128478671
>if two very high IQ parents of the same race have a child then that child's iq will be lower and be not too far off from the mean of the race
The expected value will be lower than that of his/her parents, but the child still _might_ have a higher IQ. It's still best to consider this as a Gaußian generating process.

File: pearsonx.gif (13KB, 576x384px) Image search: [Google]

13KB, 576x384px

>>128481125
>>128482039
This graph is based on father's height, doesn't take the mother's into account. Don't fall for this bullshit, traits are hereditary. You look like your parents, not like every other person your age. The average doesn't affect you unless your parents are the average.

>>128482039
It is fairly well-known that the IQ of a child will be the average of its parents, so in case of a mixed race child, it can only regress towards the lower of the two IQs. Things rarely *regress* to a higher state, after all.

Height? Dunno, never researched that. But it could work in a similar fashion, given that both the brain and the rest of the body were subjects to evolution.

>>128482039
All traits inherited from both father and mother tend to be the mean of those two traits. A wholphin is a hybrid between a bottlenose dolphin and a false killer whale. Bottlenose dolphins have 88 teeth, false killer whale have 44 teeth, so the wholphins tends to have 66 teeth.

You're better off asking /sci/ this, regression to the mean is just a statistical phenomena.

>>128478671
It would work in exactly the same way between races as within races. adult iq is around 2/3-3/4 genetic. It depends exactly what traits you're looking at but essentially just take an average of the two parents and create a new gaussian based on it. I'd guess mixed race might be less likely to experience some extreme forms of mental retardation due to being less likely to share deleterious mutations, but generally the same.

>>128481125
you've significantly misunderstood this subject.

>>128488228
I don't think he did. The idea is that it doesnt really matter how high the parent's IQ is. I've even read that the more extreme the IQ, the greater the effect of the regression. Like sure there is still inheritance from the parents as individuals, but it seems that a great deal of IQ is simply determined by race.

>>128478671
A lot of it also has to do with nurturement of the child as a factor. Obviously, having a black father and a white mother in a shitty environment will make an equally shitty kid, but in a better environment, they may do better, but not as good as the white kids. Taking the graph in >>128484607 for example, the child's height is dependent on genes and then if the child is nourished enough. Both parents could be 7 feet tall, but it won't matter much if they starve the child. Look at Japan within the last generations between WWII and modern day - the children are far taller than their grandparents because their grandparents were starved during that era.