I have assembled three different tools that are pretty useful for cumulative review.

The Nifty Nine: 9 quizzes in AP Classroom, with one multiple choice question per section. This forms a reasonable coverage of much of the AP stats curriculum. A good start before students take a full practice exam.
The Super Six: 6 old FRQ’s with extra parts added. These 6 questions provide a very thorough coverage of topics prior to inference.
Name that Test: Old FRQ’s arranged in sets of 12. Students start by naming/identifying the correct inference procedure for each problem.