Coinbase Data Scientist Statistics & Math Interview Questions
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Calculate Probability of Wallet Linking Among Users
Wallet Linking Probability Scenario - There are n users on a platform. - Each user independently links their wallet with probability p (0 ≤ p ≤ 1). - ...
Calculate Expected Users Linking Coinbase Wallets
Coinbase Wallet Linking: Bernoulli/Binomial Setup Scenario You have n users, each independently asked to link a Coinbase wallet. Each user links with ...
Optimize no-penalty test strategy
You face a 50-question multiple-choice test (5 options each) with total time 900 seconds. Scoring: +1 for a correct answer, 0 otherwise; there is no p...
Solve the 12-coin balance puzzle
12-Coin Counterfeit Problem (3 Weighings) Setup - You have 12 visually identical coins. - Exactly one coin is counterfeit; it is either heavier or lig...
Compute wallet-link probabilities and conditionals
Wallet-Linking Probability Exercises Context: Each user links a wallet independently with probability p. Treat each user as a Bernoulli trial with suc...
Compute wallet-link probabilities and expectation
Wallet Linking: Expectation and Probability (with Poisson Approximation) You have n users. Each user links a wallet with probability p, independently ...
Calculate Expected Users Adopting Wallet Feature
Wallet Feature Adoption – Probability and Expectation Setup - You are analyzing adoption of a new wallet feature. - There are N users. Each user indep...
Model Feature Adoption Probability for Users
Feature Adoption Probability Modeling Context You are analyzing adoption of a new wallet feature. Each of n users independently adopts the feature wit...
Calculate Expected Links and Conditional Probability for Users
Wallet Linking Probabilities Context Each of n users independently links their Coinbase wallet with probability p. Let A and B denote two specific use...
Determine Conditions for Multiplying Event Probabilities in Statistics
Scenario You are modeling multiple, distinct risk events in Coinbase Wallet (e.g., E1, E2, …, En) and want the probability that all occur, or that non...