Mike Wierzbicki
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 Oct 19 comment Finding a constant k such that P(X+Y) = 0.05 +1. I tried the double integration way and kept getting stuck on my limits of integration (Il-Bhima's solution is basically what I tried to do). Drawing a pic of the problem is often a useful trick to try -- it can really simplify the problem. Oct 19 comment Finding a constant k such that P(X+Y) = 0.05 I retract my answer and point you towards: www-stat.stanford.edu/~susan/courses/s116/node114.html The way I wrote it should work, but there was something subtle I was missing. Oct 19 comment $\frac{d}{dx}(b^TAx)$ where $b, x \in R^{n\times 1}$ and $A \in R^{n\times n}$ Wikipedia's article on Matrix calculus may help with the definition of vector derivatives. Oct 19 awarded Nice Question Oct 19 awarded Student Oct 19 asked Hilbert's 19th problem: Why do we care? Oct 18 comment biased Maximum Likelihood estimation MLEs are not required to be unbiased. I'm confused as to what you're asking. Oct 18 revised Covariance of bi-variate normal distribution re-Fixed LaTeX and added normal distribution tag Oct 18 suggested approved edit on Covariance of bi-variate normal distribution Oct 18 comment an independent probability problem Your #1 and #2 are the same. Oct 18 revised Convergence in probability of Sn / n Replaced 'the easiest' way with 'one way' since I don't know for sure if it's the easiest way Oct 18 answered Convergence in probability of Sn / n Oct 17 awarded Vox Populi Oct 17 awarded Suffrage Oct 17 revised Limit of $x\left(\left(1 + \frac{1}{x}\right)^x - e\right)$ when $x\to\infty$ Converted his math to LaTeX. Added limit tag as its a limit question. Oct 17 suggested approved edit on Limit of $x\left(\left(1 + \frac{1}{x}\right)^x - e\right)$ when $x\to\infty$ Oct 16 comment What is the relationship of $\mathcal{L}_1$ (total variation) distance to hypothesis testing? It's an Asymptotics course taught by Mark Low. No textbook, though. We basically discuss a lot of the research he's done in the last 15 or so years, so his publications would be the equivalent of the course textbook. Oct 15 awarded Citizen Patrol Oct 15 comment How to prove $n < n!$ if $n > 2$ by induction? Is the ''suppose it's true for all $k\leq n$'' necessary in the way you proved it? Seems you only need to suppose it's true for k to prove it's true for k+1. That is, is strong induction necessary for this? Oct 15 awarded Editor