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Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:25 AM
micromass
1 31,959
Hi! I'm taking my first course in statistics and am hoping to get some intuition for this set of problems... ...
May31-14 05:44 AM
FactChecker
3 267
for second group, why the set of numbers of ( 132, 152, 153, 154, 213, 214 , 215, 216, 231, .......) is not included?...
May30-14 08:06 PM
Simon Bridge
7 307
Hi! Suppose we have two variables Y and Z that depend on a third one, X. We are given P(x), P(y|x) and P(z|x). The...
May30-14 07:28 PM
carllacan
4 194
Something that I haven’t given much thought to, until recently, is probability. This book I have been reading goes...
May29-14 12:28 AM
switz5678
12 636
I have a byte array of length 16384 bytes obtained from random.org/bytes. There is a random number sequence test...
May26-14 11:00 PM
FactChecker
5 314
Hello I know this sounds stupid but my friend told me about something that made me think. So what he told me was that...
May26-14 05:04 PM
Curly_810
3 439
Guys... I'm not a mathematician, so, sorry about my informality in math... here is something crazy that I...
May26-14 02:41 PM
maajdl
11 565
Hi. I notice that some values of X on the exponential distribution PDF have a value of around 1. I understand the...
May26-14 07:13 AM
oneamp
6 210
What is the significance of the standard deviation (equal to the mean) in an exponential distribution? For example,...
May26-14 07:13 AM
oneamp
6 242
I know that if you have 4 numbers eg. 1,23,4 then the total number fo diffferent combination is 4*3*2*1 = 24 what...
May25-14 04:57 AM
paulfr
5 322
Can I get the link to the prime number theorem?
May24-14 11:06 PM
micromass
1 242
Firm has 10 employees, 2 womens and 8 mens. The Management Board will randomly select 3 employees and reward them with...
May23-14 02:12 PM
HallsofIvy
1 237
Hi all, Suppose I have a kinetic model for a stochastic system of three states, as shown in the attachment. I solve...
May22-14 11:23 PM
phyalan
3 248
I have some noisy data (x-y coordinates) containing two distinct clusters of data. Each cluster is centred at an...
May22-14 11:49 AM
jim mcnamara
23 583
According to Wikipedia, Baire space is defined as "the Cartesian product of countably infinite copies of the natural...
May21-14 10:55 PM
PeterDonis
2 300
Q.1 what is probability in queuing system Q.2 how many type of probability we can determine in queuing system ...
May21-14 09:54 PM
vead
2 211
Suppose we have an observation y = c+ e where c is an unknown constant and e is error with the pdf = exp(-e-1) for e...
May21-14 11:46 AM
mfb
1 199
Hi, I've got a distribution of points in two dimensions and would like to demonstrate if these are randomly...
May19-14 03:02 AM
stephenx_86
9 391
Hey all, have a problem to solve for my new game game. really appreciate if someone can help me solve this issue: ...
May18-14 09:39 AM
haplo3
3 387
Suppose I have an box (set) containing two different colored balls, red and blue, say. Now, suppose the balls...
May17-14 10:42 PM
FactChecker
6 331
I watch lastly a lottery game : there are 80 numbers, from them 20 are selected, and you can choose for example to...
May16-14 08:24 PM
alan2
4 284
Hi. When it comes to hypothesis testing, what is the difference between the two-sample tests and the paired test? ...
May16-14 10:42 AM
Nikitin
1 208
This is a vague question and I apologize in advance for not being able to explain it better. I'm combining r.v.'s...
May15-14 05:09 PM
Stephen Tashi
7 336
let X1 and X2 be independent Poisson variables with respective parameters μ1 and μ2. Let S = X1 + X2. Is X1 given S=s...
May13-14 04:26 PM
mathman
4 335
hey pf! i was wondering if someone could either direct me to a source or help supply a proof on why skewness and...
May12-14 09:48 PM
FactChecker
3 401
Gödel-numbering (in its broadest meaning, not necessarily the one Gödel used): On one side, it would seem that an...
May11-14 01:00 AM
nomadreid
8 352
There seems to be two concepts of what constitutes a "meaningful" proposition in logic: one is that you can build up...
May11-14 12:57 AM
nomadreid
4 349
I'm writing the paper on this experiment I just did. Basically I took sets of data for two variables (x,y) and I fit...
May10-14 10:25 AM
saveGuard
3 435
Hello, 1. Does anybody know which book that gives a good explanation about monte carlo simulation? I've read many...
May9-14 11:20 AM
stn
3 390
consider the following model for aggregate claim amounts S: S=X1+X2+.....+XN where the Xi are independent,...
May9-14 02:28 AM
Stephen Tashi
1 259
Hello, I'm David. I'm a new member here. Could anyone of you help me? Where can i find the formal deduction of...
May7-14 08:47 PM
davidsousarj
4 1,247
suppose you have two random variables X and Y which are independent, we want to form a new random variable Z=XY, if...
May7-14 08:33 AM
statdad
1 265
So I thought up a "proof" for infinite primes. I'm assuming I did something wrong, but I don't know what, it would be...
May6-14 08:57 PM
m84uily
10 473
Hi all, Consider the scatter plot below (example only): http://i.imgur.com/CpVZF04.png The bottom subplot...
May5-14 07:15 PM
Ikaros
2 264
hey all (again)! how do people create pdf's? it seems like we start by collecting info and turning it into a...
May5-14 01:32 PM
joshmccraney
2 272
Let (A,\mathcal A), (B,\mathcal B) be measurable spaces. Let p be a probability measure on (A,\mathcal A), and let...
May5-14 10:20 AM
economicsnerd
2 510
Q: How do you find the phase between an input and output signal? These signals are swept-sin (chirp:...
May4-14 10:18 PM
Greg Bernhardt
1 497
Suppose we have an M/M/##\infty## queue with arrival rate ##\lambda## and service rate ##\mu## that is empty at time...
May4-14 10:18 PM
Greg Bernhardt
1 307
Hello Is it true that if a counting process has stationary increments, then it is time homogeneous? stationary...
May4-14 10:18 PM
Greg Bernhardt
1 306
Pretty theoretical question here. I was talking with one of my friends the other day about a basic statistics problem...
May4-14 09:41 AM
mfb
1 248

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