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Junior Quantitative Research Analyst Interview Questions

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The technical questions: 1. You want to measure the temperature of an oven. You have three measurements from three thermometers, which are unbiased, but each with a different variance: {1, 1, 2}. Out of these measurements, how will you estimate the oven temperature most accurately? 2. A rare disease occurs in 1 out of 1000 people. If you don’t have the disease there is a 5% chance that you test positive. If a person tests positive in a clinic, what is the probability that he/she has the disease? I don't remember the numbers exactly, but this was the nature of the question. I used Bayes theorem to answer it.
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Quantitative Analyst

Interviewed at Google

4.4★
Nov 16, 2018

The technical questions: 1. You want to measure the temperature of an oven. You have three measurements from three thermometers, which are unbiased, but each with a different variance: {1, 1, 2}. Out of these measurements, how will you estimate the oven temperature most accurately? 2. A rare disease occurs in 1 out of 1000 people. If you don’t have the disease there is a 5% chance that you test positive. If a person tests positive in a clinic, what is the probability that he/she has the disease? I don't remember the numbers exactly, but this was the nature of the question. I used Bayes theorem to answer it.

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