Google Data Scientist Statistics & Math Interview Questions
Practice 32 real Statistics & Math interview questions for Data Scientist roles at Google.
"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."
Test if one value comes from N(μ,σ²)
This question evaluates understanding of hypothesis testing and statistical inference, specifically the formulation and interpretation of a z-statisti...
Test a coefficient and explain t-distribution
In OLS, test whether feature j is relevant. a) State H0: β_j = 0 versus H1: β_j ≠ 0 and construct the t‑statistic t_j = b̂_j / se(b̂_j), giving the ex...
Estimate Population Mean and Conversion Rate Accurately
Estimate Population Mean and Conversion Rate Accurately You are asked a series of statistical inference questions covering hypothesis testing, confide...
Assess Fundamental Statistics Knowledge in Data-Science Interviews
Fundamental Statistics for a Data Science Interview You are given several standard statistics tasks commonly used in a data-science technical screen. ...
Generate Uniform Samples and Estimate Percentiles
Solve two Google statistics questions: sample uniformly from a square using rand01 and estimate percentiles from histogram buckets using cumulative co...
Determine Normality of Single Observation with Z-Test
Hypothesis Test for One Observation Against a Standard Normal You observe a single numeric value x and want to decide whether it could plausibly have ...
Explain and resolve Simpson’s paradox
Define Simpson’s paradox and construct a concrete numeric example where group-wise success rates favor treatment in each subgroup but the aggregate ra...
Explain Simpson’s Paradox and Its Causes with Example
Simpson's Paradox: Definition, Cause, and Example Demonstrate your understanding of Simpson's paradox in a statistics or analytics interview. Define t...
Generate Samples from Truncated Normal Distribution
Sampling from a Truncated Normal Distribution You draw from a normal distribution but only keep observations that are at least 1. Assume the original ...
Approximate a percentile from buckets
Estimate a percentile from histogram bucket summaries by finding the cumulative-count bucket, avoiding midpoint bias, interpolating within the bucket ...
Determine Impact of New Chat-Notification on User Engagement
Determine Impact of New Chat-Notification on User Engagement Scenario A product team wants to determine whether a new chat-notification design increas...
Estimate percentile from buckets
You are given an approximate histogram of search-query frequencies. Each bucket i is represented as (left_bd_i, right_bd_i, bucket_count_i), where buc...