Boston Consulting Group Data Scientist Statistics & Math Interview Questions
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Compute posterior and predictive coin probabilities
Bayesian coin: posterior, prediction, and stopping-time expectation Context - You have two coins and will use the same coin for all flips: - Fair co...
Defend MSE over MAE for car prices
Choosing MSE vs. MAE for Car Price Regression (Unscaled USD Target) You are training a regression model to predict car prices in USD. The target varia...
Compute averages and binomial/Poisson probabilities
Streaming Mean and Binomial vs Poisson Approximation Part A — Streaming Mean Update You have an existing dataset of N = 1,000 observations with mean 1...
Derive Probability of Even Sum in Bernoulli Trials
Probability Puzzles: Parity and Runs Context You are given two independent probability problems commonly seen in data-science take-home assessments. A...
Calculate Probability of Heads and Red Balls Drawing
Quick-Fire Probability (CodeSignal-style) Context: Answer the following independent probability questions, using binomial (independent trials) and hyp...
Calculate Probability and Statistics for Dice Roll Outcomes
Dice Rolls and the Binomial Model Scenario A casino analyst models dice rolls to understand outcome probabilities for marketing promotions. Question Y...