TIA Practice App (iOS / Android)

I am very excited to announce that the Practice app is now available on both iOS and Android.

Now you can practice problems wherever you are without any need for a live internet connection, and your problem history will stay synced across all of your devices.

Here are some of the features in v1:

  • Work problems in order or randomly in continuous mode
  • Create custom length quizzes to emulate timed practice exams
  • Get instant feedback on problem attempts, with both written and video solutions
  • Filter problem sets by flagged or missed
  • Review problem history and re-work problems directly from history
  • Quick access to the discussion forum for each problem

What I am most excited about is the future of this new app.  This is a platform that we can use to add more and more features over time.

Let me know what you think of the app, and what features you would most like to see added!

Don’t forget that you can also download lessons using our Learn app (iOS, Android), and review formulas and concepts using the flashcards in our Review app (iOS, Android).

Last Minute Exam Thoughts

As the exam is in two days, your primary focus should be getting a good night’s sleep on Tuesday night and being well rested. Personally I wouldn’t be doing more at this stage other than looking at formulas and trying to memorize whatever remaining check list items you have.

If you want to work a couple off the beaten path computational topics, the two oddballs that I think are most likely to appear on the exam are computing DIC given some data and a sample from the posterior, and computing R-hat given some summary information, much like problems 21 and 23 on my practice exam. My thinking here is that there aren’t many computational things that can be asked about DIC / WAIC, and they asked about WAIC last sitting so DIC seems likely to come up this time. Likewise, with computational tests about MCMC convergence, they can either ask you to compute n_eff, which they did last time, or R-hat. Just remember to take the square root at the end of your R-hat computation, which I forgot to do when writing the solution.

Whatever route you take, good luck Wednesday.