Kaplan diagnostic test vs GMAT prep practice test

Hi Mike,

The Kaplan tests are designed to be accurate--but more importantly, to be useful diagnostic tools, since they provide a breakdown of your performance section-by-section and test by test. That said, the last time I checked, the margin of error on the GMAT was +/- 29 points (yes, you can't actually score in increments of 29--this is a statistical construct!). That means that your performance will vary by small amounts from test to test, and it sounds like all of your practice tests have been roughly in that range. That also means that even if you are consistently getting 450-460 on multiple practice tests, you still might find yourself below your minimum cut-off on Test Day; you'll want to pull your practice scores up a bit more to make absolutely sure you're ready to hit that target!

Hope this helps,