How do I handle a second on-site interview?

What's a good way to study probability and statistics for a Google product manager onsite interview?

• I'm studying for an onsite interview with Google for a product manager position. While looking at interview questions online, I've realized that I really need to brush up on the probability and statistics that I once knew well in college -- marbles, cards, dice, etc. I'm expecting questions like this one: If the probability of observing a car in 30 minutes on a highway is 0.95, what is the probability of observing a car in 10 minutes (assuming constant default probability)? What's a good way to find a lot of problems at this level? I'd like to try to do several per day between now and the interview (which is a couple weeks away). Are there any good books of problems like this? I don't *think* I need to study permutations/combinations or types of distributions or anything like that, so a general prob/stat textbook isn't really what I need. I don't really know how to characterize those problems well enough to search for them. Thanks!

• Answer:

  I've worked with a lot of Google PM candidates, and this question category you mentioned is quite rare: I would put it in the brain teaser category; that is, trivia minutiae that mature Google PM interviewers would not normally ask in a PM interview. Brain teasers have largely been banned at Google.Why? If you really needed to know probability or stats in the workplace, you could either ask a co-worker or yes, even Google it.If you do have time, it doesn't hurt to brush up on probability basics. A good resource would be http://www.amazon.com/Schaums-Outline-Statistics-Edition-Outlines/dp/0071822526.But just make sure more likely topics, such as product design, analytics, strategy, and technical, are in strong shape before undertaking stats and probability prep.