I think u not from this research field, they use the same method to analyse the reseach data, there is a thing call p value. So the analyse data show that race is an important factor and it is true from what they said. The result is there for a reason. Ppl are businessman, making money from social. They not gonna cheat on yhis

The significance of the processed data, the end result of the hypothesis.

https://www.google.com/search?ie=UTF-8&clie...+square+p+value