1. R coding
Given a dataset, generate frequency tables for all categorical variables, get means and variances for all continuous variables
As few lines as possible
2. Probability
A guy randomly picks an integer K from 1 - 100, then he tossed a fair coin for K times, he wins if he get exactly one head, what's the prob. that he wins
3. How to examine if a die is fair
followup: how many times you need to throw the die.
4. You are the TA in a class,
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