Data Scientist Statistics & Math Interview Questions
Practice 455 real Statistics & Math interview questions for Data Scientist roles. From companies including Meta, Capital One, Google, Amazon, Uber.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Answer regression error and coin toss expectation
Multiple choice: Regression assumptions + expectation Answer the following. 1) Linear vs. Logistic Regression “error” statements Which statement is mo...
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...
Answer Statistics Questions for Spokeo DS Role Quiz
Timed Statistics Quiz: Short-Answer Concepts Answer the following independent questions succinctly. Assume standard statistical definitions and that s...
Analyze Central Limit Theorem in User Comment Distribution
Comments per User — CLT, Expectation, SD, and 95% CI Context You are measuring how many comments each user makes in a fixed time window (e.g., one wee...
Design Sampling Strategy to Estimate Fake News Proportion
Estimating Fake News Prevalence and Impact on Facebook Context Management is concerned about the volume and impact of fake news on the platform. You a...
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...
Determine Probability of Shared Videos in Recommendations
Video Recommendation Probability and Product Trade-offs Scenario A video-recommendation system selects K distinct videos for each user from an invento...
Derive Coefficient and Covariance in Regression Analysis
Correlation Structure, Regression Slopes, Covariance of Order Statistics, and Change-of-Variables You are given standard random variables and asked to...
Determine Key Statistics for Article Comment Distribution Analysis
Analyzing Comment Counts per Article Context You are analyzing the number of comments each article receives on a content website. You have the full di...
Measure Causal Impact of Self-Selected App Redesign
Measuring Causal Impact of an Opt-in Mobile App Redesign Context A mobile app ships a redesigned UI as a new version. Users can choose to upgrade (opt...
Test Billboard Campaign Conversion Rate Exceeds 60%
One-Proportion Test for a Conversion Rate Context You ran a billboard campaign and measured conversions on a sample of N = 100 users. The observed con...
Evaluate Email Subject Line Performance Using Hypotheses
A/B Test of Email Subject Lines: CTR Hypotheses, CLT Justification, and Sample Size Context You are comparing click-through rates (CTRs) between a con...
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...
Annotating and forecasting a long‑tail distribution
Scenario You are analyzing daily share counts across many pages on a social platform. The cross-sectional distribution of per-page shares on any given...
Identify Probability Distributions for Modeling Ad Clicks
Context You are interviewing for a data scientist role on an ads team. You are asked to demonstrate knowledge of common probability models for clicks,...