Distribution of MCAT scores for students with a 4.0 (according to SDN II tracker)

[abdum]

I was playing around with the II tracker data on R. Throughout college, I've managed to maintain the 4.0 GPA, and I was curious what the MCAT distributions were for 4.0 students. Nothing too complex of an analysis, just a mere fetching of data.

I ended up with this bar graph. Interestingly enough, it seems like there's kind of a bimodal distribution that peaks around ~515 and again around ~523.

What do you guys think accounts for this trend? I had two predictions. First, I was expecting the graph to lean heavy towards the top scores and then taper slowly. Second, the graph could have all been relatively equal (as the scarcity of distribution of top scores would be balanced our by an assumed correlation of high GPA translating to high MCAT). However, neither seems to be the case.
View attachment 318490

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[lull]

doesn't look bimodial to me

 

[abdum]

Actually, I realized I bungled it and forgot to account for duplicates