Tactic101
I was more wondering if the topics had changed proportionately, for instance if standard deviation was now more heavily tested than before.
But this answers my question - thanks!!
Got it. There has been a slight change/adjustment in the GMAT topics tested (though if the Standard Deviation was tested less per se, you still want to know it for the test).
However, there has been greater number of bolded CR questions over the last 5 years or so and a greater number of the DS Geometry questions. That is why the OG 2020 has so many new Geometry DS questions, to make it more representative of the content and proportions of content you will see on the actual GMAT.
However, the rule of thumb is that you want to cover all topics tested as much as possible to maximize your chances of a higher score and save time for harder questions. The adaptive nature of the test means that you don't know what question type will be thrown out and what difficulty it will be. It may be a super easy Standard Dev question or it may be an evil one. Could be just one but really evil. On my test, I got bombed by a probability question. Fairly simple but I did not cover probability since the book i was using (annoying) did not think it needed to cover probability since those questions are not frequent and encountered only at the greater levels of difficulty.... that of course has changed since and probability is more prevalent and people are more prepared but the bottom line, it can take one question to throw you off...