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Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:25 AM
1 27,597
Hello, Iím Charlie and Iíve been trying to understand how I prove things correctly. So here is an example of the way I...
Nov6-12 05:17 PM
0 611
Pretty much every proof of this I've seen uses the axiom of countable choice at some part or another, and I never got...
Nov6-12 04:19 PM
1 752
I'm wondering if there's an expression/correction for finding the entropy of a density using histograms of different...
Nov6-12 11:16 AM
Stephen Tashi
8 1,236
With a regular deck of 52 cards, how would you find the probability of getting the Ace of Spaces if you took turns...
Nov6-12 06:24 AM
3 860
Two dice are rolled. What is the probability that the first die is a perfect square and the second die is a 4? ...
Nov6-12 05:06 AM
2 677
I am trying to investigate the statistical variance of the eigenvalues of sample covariance matrices using Matlab. To...
Nov5-12 07:38 PM
11 1,968
What branches of mathematical logic are there? I've taken formal logic (that is, the logic where one has various...
Nov5-12 05:46 PM
2 857
In Joseph Dauben's book on George Cantor, his philosophy of the infinite and hsi mathematics...there is a section...
Nov5-12 02:10 PM
1 602
So my prof. has not replied to my e-mail, so I was wondering if someone here can help me understand why the MLE for a...
Nov5-12 12:09 PM
Stephen Tashi
1 913
Hi there, I'm working on a simulation of the travel patterns of cars. There are many variables and conditional...
Nov5-12 11:30 AM
2 603
Hi there, This is going to be difficult for me to explain, so I will try my best. My statistics is kind of rusty......
Nov4-12 10:54 PM
Stephen Tashi
1 801
we know anything can happen in future.but when future becomes past only one event has actually occurred. so the...
Nov4-12 06:22 PM
1 653
I was just wondering how exactly to appropriately modify the 1st and 2nd order stats when you want to weight a given...
Nov4-12 04:44 PM
2 600
Given the following distributions I have to choose which one to use under the given scenario. Distributions -...
Nov4-12 11:26 AM
0 578
MGF of X denote M(x)=E exists for every t>0 . For t>0 Show p(tX >s^2 +logM(t)) < e^-s^2 .
Nov4-12 11:25 AM
2 845
Hi! I have an argument and I have to prove the validity of all possible ways. I have proved by logical...
Nov4-12 08:56 AM
0 672
Hi, I'm fitting a distribution to the starting times of the first car journey in the day. I have a sample of 3,000...
Nov4-12 08:47 AM
2 634
Given that X(t) is a homogeneous poisson process with arrival rate λ, how do I perform the transformation: ...
Nov4-12 08:41 AM
0 670
f(x,y) = (1/x) for 0≤y≤x≤1 A new rv Z=X+Y where X,Y not independent find the pdf of z My approach F(z) =...
Nov4-12 03:02 AM
1 524
X = # of clubs in a 13 card hand drawn at random without replacement from 52 card deck Y= # of queens in the same 13...
Nov4-12 12:01 AM
1 568
Greetings, In atomic spectra experiment I came across with error propogation in the nonlinear equation:...
Nov3-12 10:34 PM
5 980
Why is the E^2 minimized when choosing f(x) = E ?
Nov3-12 09:48 PM
1 368
For any integer valued RV X Summation n=0 to infinity of s^n P(X=<n) = (1-s)^-1 * Summation k=0 to infinity of...
Nov3-12 06:04 PM
1 565
i was trying to formalize the definition of the supremum in the real Nos (supremum is the least upper bound that a non...
Nov3-12 04:28 PM
8 1,224
I've just started studying college math. I read the proof by contradiction is based on the law of excluded middle....
Nov3-12 04:10 PM
1 631
Let X be a uniform integrable function, and g be a continuous function. Is is true that g(X) is UI? I don't think...
Nov3-12 11:52 AM
1 753
Hi forum, i'm new here, and have a burning question, that I can't seem to figure out or find on the internet. ...
Nov2-12 09:31 PM
2 547
I've taken the day off to wait for a parcel at home and (because I'm a physics student and therefore have no ability...
Nov2-12 04:04 PM
4 683
Hi, I have 3 correlated variables that I wish to model with a copula function. 2 of the variables are continuous...
Nov2-12 08:48 AM
1 477
How bad is my statistics knowledge based on the following mind map? Any concepts which aren't bold are the concepts...
Nov1-12 09:55 PM
4 805
What is the reason for calling Baye's theorem as "inverse probability"? Any valid reason? Thanks a lot
Nov1-12 11:52 AM
7 974
I need some good online resources for learning statistics. Can I opt for video tutors, suggestions please...
Nov1-12 10:25 AM
Greg Bernhardt
1 624
To get the following proof I followed another similar example, but I'm not sure if it's correct. Does this proof...
Nov1-12 01:58 AM
2 683
Let's say that a treatment A has been proven to have an impact on the levels of B with a given confidence interval....
Oct31-12 10:21 PM
1 738
Hi all, in text the formula for scaled random walk is: W^(n) (t) = (1/√n) M_nt in the example it says that: ...
Oct31-12 06:23 PM
7 1,212
Does anyone here know any good Bayesian statistics, Bayesian hypothesis testing, Bayesian inference, etc. learning...
Oct31-12 11:25 AM
11 1,003
Hello all, I'm practicing proofs and I'm stuck. Here it is: Prove that there are infinitely many solutions in...
Oct31-12 07:17 AM
30 1,741
I have a research problem that requires me to find the 95th percentile of a sampling distribution like this: ...
Oct30-12 11:05 PM
7 778
Hello all I've been practicing proofs and would like to know if I'm on the right track. Here it is: If the sum of...
Oct30-12 07:50 PM
6 639
For a normal distribution with E=0 and Var(X)=1, how do we determine the Z-value of a particular percentage ? i.e....
Oct30-12 09:28 AM
3 896

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