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2h
answered finding and angle and coordinate point
4h
comment Find $E[Z_1 | aZ_1 + bZ_2]$
It could be anything. In particular, given any non-zero $a, b, E[Z_1], E[Z_2], Var(Z_1), Var(Z_2), s$ and target $t$ it would be possible to find distributions of $Z_1$ and $Z_2$ with $E[Z_1 | aZ_1 + bZ_2=s]=t$
9h
revised Combinations from prime number of elements
deleted 76 characters in body
9h
answered Combinations from prime number of elements
9h
comment Conditional probability problem and Alias Method
I thought the "alias method" was for generating random variates. Do you plan to simulate this? Calculation would be easier and more accurate.
9h
comment Conditional probability problem and Alias Method
I do not think it is clear, but I would read it as asking for the conditional probability that at least three calls arrive given that at least two calls arrive.
10h
comment What does “combining the solutions in O(n) time” mean?
I think you may need to to put $O(\cdots )$ on the right hand side, or at least multiply $n \log n$ and $n^2$ by unknown constants
19h
comment Probability distribtuions
The exact distribution is binomial, so you are looking for an approximation for that. There are at least two possibilities, one closer than the other.
20h
comment Number of possibilities to draw from a card deck isn't an integer - where's my error?
Combinations or binomial coefficients
20h
comment Number of possibilities to draw from a card deck isn't an integer - where's my error?
So the same answer as Brian M. Scott, but with a different approach
20h
answered Number of possibilities to draw from a card deck isn't an integer - where's my error?
20h
revised Number of possibilities to draw from a card deck isn't an integer - where's my error?
explanation of 40 in comments
21h
comment Number of possibilities to draw from a card deck isn't an integer - where's my error?
If order matters then there are $5^4$ possible patterns, though there are not of equal probability. But you would not divide the $1$ pattern of four Aces by $4!$ to get the number of unordered paterns
22h
comment What is the magnitude of Complex random variable Gaussian Case?
How do you know they should be Rayleigh and exponentially distributed respectively? I would be surprised if they were
1d
comment Dividing by 2 numbers at once, what is the answer?
@MrDosu By convention $4-1-5=(4-1)-5$ and $4/1/5=(4/1)/5$ but also by convention $4^{1^5}=4^{(1^5)}$ rather than $(4^1)^5$, so convention is not totally consistent
1d
answered probability theory: best predictor allowing for nonlinear predictors
1d
answered Percentage Question from GRE
1d
comment Percentage Question from GRE
The "nor" should follow a negative. Is there a typo?
1d
comment Proving a palindromic integer with an even number of digits is divisible by 11
Use $10000\ldots 00001 = 11 \times 909\ldots 09091$ or $10^{2n+1}+1 = 99\times10^{2n-1} + (10^{2n-1}+1)$
1d
comment Weighting with restrictions, but no clear objective function?
There may be more than one solution (or there may be no solution). In particular there is the question of when the constraints bite, given the choice would you prefer to have individual shares close to their "true weight" or to have sectors close to their "true weight"? Either way, one approach would be to run this and give preliminary weights, then constrain those over the bounds, and revise those with unconstrained preliminary weights, then rinse and repeat until you have a solution or cannot improve the situation.