Race and IQs

[Anomalocaris]

The very question you pose after appealing to that ultimate authority called Wikipedia suggests you didn’t understand what the authority said.

Say we're fliping a coin and determining how often it lands on heads or tails, the null hypothesis would be that the coin would have an equal chance of landing on heads as it would tails.

If your claim is that there are factors that would cause the coin to favor one side over the other, then what are the factors?

My question was basically asking what causes one to think that race plays a factor in determining IQ? Where is something tangible we can point at and say, ah ha, this race, has or lacks X that determines the level of intelligence?

No.  Null hypothesis depends on what your proposition is.   If you flip a coin and assert there is equal chance of it coming up heads or tails. Then the null hypothesis is it would preferentially come up one side rather than the other.

If you flip a coin and assert there is a greater chance of it coming up tails than heads, then the null hypothesis is it would not come up tails more often than heads.

Null hypothesis makes no assumption about how things are more likely to be. It simply says your evidence doesn’t prove your assertion as strongly as you think it does.

If your proposition is there is no difference in inteliigence between races, then the null hypothesis is there is.

If your proposition is there is difference in intelligence between races, then the null hypothesis is there isn’t.

What causes one to advance the proposition is irrelevant.  Something that is true remains true even if spoken for the most absurd reasons or out of the greatest malice.   Whether that thing actually is true must be evaluated based on evidence that can be used to support it.