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6h
comment Continuous probability - calculate probability of r.v and distribution function
$f(x)=0$ for $x \lt 0$
8h
comment How to show convergence in probability by just using the definition?
@YonatanN: $f(X_n)$ is presumably the probability mass function for $X_n$
8h
comment Tautological Proof Help
If a tautology is what I think it is, I do not see why the first statement need be true.
8h
comment Does $n\pi - \lfloor n\pi\rfloor$ have a subsequence that goes to zero?
@ThomasAndrews: Yes - you beat me by a few seconds
8h
revised Does $n\pi - \lfloor n\pi\rfloor$ have a subsequence that goes to zero?
added 117 characters in body
8h
answered Does $n\pi - \lfloor n\pi\rfloor$ have a subsequence that goes to zero?
8h
comment Is Bayesian Inference what I need?
Are you thinking about cluster analysis or unsupervised learning? They are big subjects, but your linked example is about prediction of gender from height and weight, which is supervised learning, rather different
16h
comment Is Bayesian Inference what I need?
You will not be able to do any inference unless you have some observations of success and failure
19h
comment Which distribution would be the most appropriate?
Once you have decided to go for a continuous distribution with support only on positive values, anything further can only really be judged empirically. This paper considers the log-normal, exponential, gamma and Weibull distributions potentially plausible and then finds that the log-normal appears to fit particular data more closely than the others.
19h
revised probablitly using bayes theroem
layout
1d
comment How to calculate the integral of exponential of complex exponential?
Is $j = \sqrt{-1}$?
1d
comment Subsets of sets containing empty set
You could say that $\{\{\emptyset\}\}$ has a single element $\{\emptyset\}$ and two subsets $\{\{\emptyset\}\}$ and $\emptyset$. Meanwhile $\{\emptyset\}$ has a single element $\emptyset$ and two subsets $\{\emptyset\}$ and $\emptyset$.
1d
comment How do I form this into an equation? 8\$ per customer, until 50 customers, then profit deceases by .1\$ per customer?
or you could use an indicator function as in $8x -I_{x \ge 50} (0.1x^2-5x)$
1d
comment What is distribution of Poisson multiplied by positive constant
@Kim: The derivation comes from a simple substitution $n=z/\alpha$, so it is easy to calculate $(z/\alpha)!$ when $z/\alpha$ is a non-negative integer. You are correct, saying $Z$ is not Poisson, if $\alpha \not =1$. For example $E[Z]=\alpha \lambda \not = \alpha^2 \lambda = \text{var}(Z) $
1d
answered What is distribution of Poisson multiplied by positive constant
1d
answered Two random variables X and Y follow the same distribution. Then
2d
answered Does $\Bbb P (A | B ) = \Bbb P(A | C) \Bbb P(C|B)$?
2d
revised Suppose you roll two dice. Find the probability that you roll an 8, provided you roll a 7 or 8 first?
edited tags
2d
comment Suppose you roll two dice. Find the probability that you roll an 8, provided you roll a 7 or 8 first?
Because if your first roll in Craps is $8$ then it becomes the "point" and the next stage is to keep rolling until you get a $7$ or a second $8$. Your question then starts to make sense if understood as being "Given you initially rolled an $8$ with two six-sided dice and then keep rolling them, what is the probability you roll a second $8$ before you roll a $7$?"
2d
comment Suppose you roll two dice. Find the probability that you roll an 8, provided you roll a 7 or 8 first?
Is this supposed to be related to Craps?