Thumbtack Data Scientist Statistics & Math Interview Questions
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3 Questions 1 Company
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Thumbtack
Medium
Data ScientistDesign cross-validation; explain bias–variance
Define cross-validation rigorously and compare k-fold, stratified k-fold, leave-one-out, nested CV, and time-series rolling/blocked CV. For a dataset ...
Statistics & Math
0
0
Oct 13, 2025
Thumbtack
Medium
Data ScientistOptimize red-ball draw probability, prove optimality
Two-Box Ball Allocation to Maximize Probability of Drawing Red Setup - You have 2 boxes and two colors of balls. - In the 100/100 case: 100 red and 10...
Statistics & Math
0
0
Oct 13, 2025
Thumbtack
Medium
Data ScientistTest regional response-rate differences rigorously
Goal Assess whether provider response rates differ by region after adjusting for job category mix and time. Data You have job-level observations with ...
Statistics & Math
0
0
Oct 13, 2025