Analyzing College Major Charts /Statistics

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This thread is for analyzing findings in statistics related to college undergraduate/graduate programs, especially to find anomalies.

So, this chart is showing that people who intend to attend graduate school for physics and philosophy/classical language are the HIGHEST scoring on the GRE overall.
Why is this? Is it because they majored in physics or philosophy? Do these majors make you smarter or do smart people gravitate to physics and philosophy and if so then why?

It also shows that Engineering is mildly lower than Physics quantatatively(why?) but verbally, Engineering scores significantly lower, even below average across almost all engineering graduate programs. Why is this?

Mathematics seems to be almost entire comparable to physics scores but not quite.

Chemistry and Biology seem to be undeniably earning lower scores. Do they not have what it. takes for math/physics/philosophy etc?

The image is from another thread and I don't condone any of what was added to it.