Questions tagged [interview]

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Is linear regression still relevant in a mid-level DS interview?

I’m hiring for a mid-level data scientist with 2~ years of experience. The hire will be writing SQLs, working with stakeholders to define business problems and doing analytics whether an inference ...
31 views

Draw Maximum Information from Experts to set up Utility Function

We aim to draw maximum information from CEP-logistics experts to set up a utility function for delivery chain choices for each parcel. The choices / dependent variables are specific transport chains, ...
• 31
109 views

Infer relationships between coefficients given covariance information

Quant Interview Question: Given $y$ = $a_1$$x_1, y = b_1$$x_1$+$b_2$$x_2$, $cov(x_1,y)$ != 0, $cov(x_1,x_2)$ > 0, $cov(x_2,y)$ = 0. Compare $abs(a_1)$ and $abs(b_1)$. Which one is larger and ...
• 163
2k views

QR interview problem Guessing order of draws from iid U(0,1)

This is for QR at two well know trading firms (think jane street, HRT, Citadel, Jump ...)(not BB bank). Question prompt: Given n iid Uniform distributed r.v.s. $x_i$ ~ U(0,1). $x_1$ is drawn first, ...
• 163
79 views

Binary variable in regression model (interview question)

I got this question, it may be easy but for some reason for me is not: you are given a binary variable $b\in [0,1]$, that has no predictive power on $y$, but has some on $X$. How would you use it to ...
• 215