Without documenting the Change in demographics it’s meaningless. If there are more dumber people from populations with lower Iq - then this is inevitable. It’s an IQ test not a test of teaching skill.
I was a self taught software developer that was very advanced. I remember applying to Microsoft dozens of times. Your resume goes right in the trash … unless you are a foreign indentured servant. These companies are not our friends. I was permanently shadow banned and limited on LinkedIn for mentioning this. It’s a racket. Intel laying off 30K people a quarter. Who do they replace them with?
In my area, there is a Tae Kwon Do school my kids go to. You can see every year the class picture. For the last 10 years it was almost all white kids then it made a dramatic change to almost 100% Indian. We live near Microsoft. Something very obviously is going on with immigration. To say Microsoft has simply been flooding the area with Indians is shown visually.