user133466

441 reputation

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visits	member for	8 months
	seen	Jan 22 at 17:08
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	441 reputation	bio	website		visits	member for	8 months
12 badges		location			seen	Jan 22 at 17:08

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21 Accepts

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Dec 16	accepted	Is the skill to learn new math by reading textbook alone (no lectures) required when one becomes a PhD student?
Nov 28	accepted	How to integrate $\int_{-\infty}^\infty e^{\frac{-(x-y)^2}{2}} dx$
Nov 26	accepted	How is $e^x$ related to its probability density function $\lambda e^{-\lambda x} (x>0)$?
Nov 26	accepted	Is it possible to do this Poisson problem in Binomial?
Nov 25	accepted	Moment generating function: why is $\int_{-\infty}^{\infty}\frac{1}{\sqrt{2\pi}}e^\frac{-(z-t)^2}{2} dz = 1$
Nov 21	accepted	I don't understand why $X = \sum_{i=1}^n X_i$ and $Y = \sum_{i=1}^n Y_i$
Nov 18	accepted	Why is $\operatorname{Var}(X+Y) = \operatorname{Cov}(X,X) + \operatorname{Cov}(X,Y) + \operatorname{Cov}(Y,X) + \operatorname{Cov}(Y,Y)$
Nov 15	accepted	Does SSTR (sum of squares for treatments) = SSR (regression sum of squares)?
Oct 25	accepted	What is the $P( \|X-10\| > 2)$ of a normal distribution when mean is 10, and standard deviation is 6?
Oct 18	accepted	Why is the greatest and least values for each group in these 2 frequency distribution unknown?
Oct 17	accepted	Calculating Variance of a binomial distribution using the standard formula $E(X^2) - \mu^2$
Oct 11	accepted	By convention $P[X=x] = 0$ for all x. How would you explain pdf $f(x) =3x^2$ (where x is between 0 and 1) when x =0.9
Oct 9	accepted	Why does negative binomial random variable uses ${n-1 \choose r-1}$ instead of ${n \choose r}$ as coefficient?
Oct 7	accepted	Why can we use poisson distribution in this case? the n is very small!!
Oct 5	accepted	Performing hypothesis test for the difference of population means: paired comparisons
Sep 22	accepted	Probability in flipping a coin
Sep 22	accepted	Why are these two events not independent?
Sep 21	accepted	Winning game of craps?
Sep 20	accepted	Why aren't these events mutually exclusive?
Sep 19	accepted	Probability question at listing number of outcomes in the sample space.