Changes in the college admissions process may not help applicants

You ask, I provide:

https://www.researchgate.net/publication/280232788_Race_Poverty_and_SAT_Scores_Modeling_the_Influences_of_Family_Income_on_Black_and_White_High_School_Students’_SAT_Performance

https://www.act.org/content/dam/act/unsecured/documents/R1604-ACT-Composite-Score-by-Family-Income.pdf

https://economix.blogs.nytimes.com/2009/08/27/sat-scores-and-family-income/

So we know that income helps.

Here is one article of many that demonstrate that the more siblings a child has, the lower their academic achievement, AND, that the effects of income and number of siblings interact.

https://journals.sagepub.com/doi/pdf/10.1177/1069397116671139

So we now have income, and number of siblings. I am pretty sure that we can agree that the more siblings one has, the less chance there is that one has a room to oneself, and that this becomes increasingly true as family income drops.

As for the quality of schools and the SAT score of the kids, well, if they weren’t correlated, people wouldn’t be talking about the mean SAT scores of a school as an indicator of it’s quality.

So, yes, there are studies to prove going to better schools and not sharing a room with siblings likely do improve SAT scores.