Statistics & Estimation

Variance, covariance, estimators (MLE/Fisher information), regression, hypothesis testing, CLT/LLN, and concentration inequalities.

0 / 26 solved
0/26 solved
Question Tags Difficulty Success
1. Where The CLT Stops
cltheavy-tails +2
Easy 56%
2. Rolling 1s and 2s
MathStatistics & Estimation +2
Easy —
3. Matching Sums
collision-probabilityindependence +2
Easy —
4. When Poisson Is Not Close Enough
binomialpoisson-approximation +2
Easy —
5. Beverage Flavors
MathStatistics & Estimation +2
Easy —
6. McDonald's Weight IV
MathStatistics & Estimation +2
Easy —
7. Five In Million
MathStatistics & Estimation +2
Easy —
8. Multiply 3 Dice
MathStatistics & Estimation +2
Easy —
9. Variance Of A Tent Density
variancelotus +2
Easy —
10. Rotary Dial Two Steps
random-walkstationary-distribution +2
Medium —
11. Executive Marbles
MathStatistics & Estimation +2
Medium —
12. Tennis Game
MathStatistics & Estimation +2
Medium —
13. Rounds For A Monte Carlo Estimate
monte-carlostandard-error +2
Medium —
14. Pooled t By Hand
t-testpooled-variance +2
Medium —
15. Coin Game
MathStatistics & Estimation +2
Medium —
16. When Not To Pool
welch-satterthwaitedegrees-of-freedom +2
Medium —
17. Seeded Into Halves
conditional-probabilitysampling-without-replacement +2
Medium —
18. Loaded Coupon Collector
coupon-collectorinclusion-exclusion +2
Hard —
19. Perturbed Ridge
MathStatistics & Estimation +2
Medium —
20. Beach Coin Standoff
law-of-total-probabilitysymmetric-strategy +2
Hard —
21. Robot Takeoff Threshold
optimal-stoppingthreshold-rule +2
Hard —
22. Quoting Against Informed Flow
adverse-selectionmarket-making +2
Hard —
23. How Many Children
MathStatistics & Estimation +2
Hard —
24. Long Rope
MathStatistics & Estimation +2
Hard —
25. Flips For A Guaranteed Margin
cltsample-size +2
Hard —
26. Beta MLE From Four Points
mlesufficiency +2
Insane —

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26 of 26 questions here are still unsolved.