Upstart Statistics & Math Interview Questions
Upstart Statistics & Math interview questions typically probe applied probability, regression and inference, experiment design, and the kind of credit-modeling thinking that informs lending decisions. Interviewers evaluate your ability to reason about distributions and uncertainty, translate business risk questions into statistical hypotheses, and communicate assumptions and tradeoffs clearly; expect a mix of probability puzzles, hypothesis-testing/A-B testing scenarios, and questions that connect statistical choices to model fairness and performance. ([interviewquery.com](https://www.interviewquery.com/interview-guides/upstart-data-scientist?utm_source=openai)) The process often begins with a recruiter or phone screen followed by a technical assessment and one or more technical video interviews with data science or analytics team members, where live problem solving and coding may appear alongside behavioral discussion of past analyses. For interview preparation, prioritize refreshing core probability and statistical inference concepts, regression diagnostics, causal reasoning for experiments, and short coding exercises that calculate key metrics and sampling variability; practice explaining your assumptions and conclusions concisely to nontechnical stakeholders. ([interviewquery.com](https://www.interviewquery.com/interview-guides/upstart-data-scientist?utm_source=openai))

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Compute decay, OLS, and classic probability results
You are asked several probability/statistics questions. 1) Radioactive decay (half-life) A radioactive atom has a half-life of 1 day. Assume each atom...
Solve drunk-passenger probability and simulate outcome
Lost Boarding Pass Puzzle: Last Passenger's Seat Context: Technical screen for a Data Scientist (Statistics & Math). Setup - There are n passengers la...
Identify binomial model and compute moments
Tossing N Balls Into a Cup (Independent Hits with Probability p) You toss N independent balls toward a cup. Each ball lands in the cup with probabilit...
Combine noisy thermometers; compute random-walk correlations
Problem 1: Estimating a true temperature from noisy thermometers Assume the true (fixed) temperature is an unknown constant \(\theta\). 1a) One thermo...
Analyze HT vs HH stopping-time probabilities
Coin-Flip Stopping Game: HT vs HH You repeatedly flip a coin until either the pattern HT appears (Player A wins) or the pattern HH appears (Player B w...
Interpret A/B results with p-values and uncertainty
A/B Test: Effect Sizes, CIs, Multiple Testing, Power, and Decision Context: You ran a 14‑day experiment (2025‑08‑15 → 2025‑08‑28) with 1:1 allocation ...
Calculate Expected Streaks in Coin Toss Sequence
Expected Number of Streaks in Coin Tosses Scenario You toss a coin repeatedly. A "streak" (a run) begins on the first toss and whenever the current to...
Estimate and Derive Regression Coefficient for X on y
Statistics & Probability Onsite — Two-Part Question Context - You have a simple linear data-generating process: y = X + ε, where X and ε are independe...
Estimate Family Proportions and Explain Regression Anomalies
On-site Statistics Round Task Overview You are given a population of families that have either 1, 2, or 3 children. You sample 100 children (i.e., the...
Assess Probability of Heads in Coin Tosses
Probability with Coin Tosses and the Normal Distribution Context Onsite data scientist screening question assessing basic probability and distribution...
Calculate Particle Survival Probability After Time t
Radioactive-Decay Style Probability Context You have 100 identical, independent particles. Each particle's lifetime is exponentially distributed with ...
Determine distribution of aX+b when X~N(0,1)
Linear Transform of a Standard Normal Setup - Let X ~ N(0, 1) (standard normal). - For constants a, b ∈ ℝ, define Y = aX + b. Tasks (a) What is the ex...