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age 28
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seen 9 hours ago

PhD Biostatistician


Nov
1
awarded  Civic Duty
Oct
27
revised Are there any (pairs of) simple distributions that give rise to a power law ratio?
added note about Dilip's (correct) response.
Oct
27
comment Are there any (pairs of) simple distributions that give rise to a power law ratio?
+1 Nicely done. I didn't bother with fact-checking as my answer was meant more of a 'point-in-the-right-direction' rather than a 'here's-the-solution.' More wise advice from Dilip: fact-check your sources.
Oct
24
comment What is the following Calculation about?
Hi testiii, I converted your math to LaTeX. Can you make sure I copied the problem correctly?
Oct
24
revised What is the following Calculation about?
Inserted LaTeX
Oct
24
suggested suggested edit on What is the following Calculation about?
Oct
22
comment Stuck trying to prove an inequality
@Phira I get $9\leq 2+0+2+2+0+2+2+0+0=10$.
Oct
22
comment Are there any (pairs of) simple distributions that give rise to a power law ratio?
Wise advice. Always check what notation is being used.
Oct
21
answered Are there any (pairs of) simple distributions that give rise to a power law ratio?
Oct
21
comment What is the relationship of $\mathcal{L}_1$ (total variation) distance to hypothesis testing?
@cardinal I believe you're right. There's another subtle step hidden: $TV(P_0, P_1)=\sup_A (|P_0 - P_1|)$, so you need to convince your self that $\sup_A (|P_0 - P_1|)=\sup_A (P_0 - P_1)$ (which doesn't take much convincing).
Oct
20
answered The role of writing in understanding concepts
Oct
20
comment Expected number of draws until the first good element is chosen
@MikeSpivey +1 Of course! Serves me right for thinking through the problem too quickly! I'll remove it to avoid confusion.
Oct
20
answered Values of parameters for which a function is differentiable
Oct
20
awarded  Commentator
Oct
19
comment $XX^t=A$, $X=?$. Where $X \in \{0,1\}^{n \times m}$
Is your constraint that $\sum_{j=1}^{m}x_{ij}=2$ for the $3\times3$ case, or in general?
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