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Set Theory, Logic, Probability, 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 27,622
Hi, I'm currently trying to work through a problem about calculating the most likely time for a hard disk to fail: ...
Dec21-11 01:11 PM
Stephen Tashi
1 1,442
Hi guys! I have a set of datapoints, and im about to use Gauss-Newton to fit a model function (Lorentzian) to...
Jan12-10 03:10 PM
Or Entity?
6 2,055
Can anyone help me to found the the likehood fonction for Log-periodic-power-law ? log(y(t))=A+(B(t-tc)^β...
Dec16-13 10:41 AM
Stephen Tashi
1 389
1.Given the joint probability distribution of Y1 and Y2: f(y1,y2)= (2/5)*(2y1+3y2), 0 0, elsewhere find ...
May1-04 06:16 AM
1 2,617
Hello All, I calculated an average latency value let say 3 units then after observing the network I found that...
Dec2-11 06:38 PM
Stephen Tashi
3 1,459
Hi all, I've done a regression and have the Standard Error of the X co-efficient (i.e. the slope). How do I...
Nov2-10 01:48 PM
1 3,621
Hi guys, I am trying to learn why there is endogeneity in the following OLS estimated regression model: ...
Jun21-12 07:11 AM
1 537
Has anybody ever heard of some mathematical application of negative probabilities ? What problems arise from allowing...
Oct15-07 10:36 PM
7 2,161
If < is any total order in R, isn't it always possible to construct an infinite sequence x1 > x2 > x3 > ... > y for...
Oct10-11 11:28 PM
13 2,458
If we want to do a specific operation for each element in a set in specific order, is there some limitations for that?...
Sep23-09 08:09 AM
2 823
I've been following the first few chapters of Yuri Manin's "A Course in Mathematical Logic for Mathematicians," and as...
Jul15-10 04:49 AM
3 984
Say there are N gladiators, and I want to find the champion among them. The method by which this is done is a series...
Sep28-12 02:33 AM
6 684
Hi! Me and some guys at work has a little argue about how many combinations you can have after that you have throwed...
Aug14-08 05:55 PM
1 2,154
Hi, I know very little about maths. I'm struggling to get my head around a question I was asked today, and I was...
Apr22-11 02:57 PM
Stephen Tashi
4 4,170
I am reading a reference that says, with f(x) being the failure probability density function, reliability of a system...
Dec9-13 04:30 AM
4 410
Hello. I have two probability density functions for two events. I would like to find the probability that they both...
Dec10-13 03:41 PM
6 595
Hello I am building a set of data. It is composed of events that occur at discrete times throughout a day. There...
Jan26-14 02:54 AM
3 250
I have a mean mu, and an exponential distribution function. How do I use a random number, generated with a PRNG, to...
Jan29-14 10:34 AM
6 257
I am told that an exponential distribution is memoryless. But why aren't other distributions, such as the normal...
Feb5-14 12:23 PM
3 223
Hello May I know what is the difference between Confidence Interval for Population Mean (μ) when σ Known vs...
Jan8-14 09:34 AM
4 348
is there a way to explicitly express the chi-squared inverse function? when programming it, I have had to resort to...
Jun29-11 06:53 PM
12 4,367
I have the following sequences of numbers: 1) 32, 16, 8, 4, 2, 1 2) 32, 16, 8, 2, 1, 0.5 3) 32, 16, 4, 2, 1, 0.5,...
Jul10-10 01:20 PM
1 1,209
Given a set of random real numbers G=(a, b, c, d, e, f, ...), Im supposed to calculate the number T such that the sum...
Feb22-11 02:36 PM
6 908
Given a set of 2D coordinates (real numbers, involves positives and negatives), I could calculate the (weighted)...
Feb28-11 03:04 AM
1 1,124
I have the following logical statement (A \wedge B) \Longleftrightarrow (A \wedge C) I want to find other logical...
Jun9-11 12:31 AM
3 1,935
What's the symbol in the attached image, that looks like a right pointing arrow, but with a short perpendicular arrow...
May30-11 05:10 PM
8 2,126
I have a question on the textbook "Mathematical Logic: Propositional calculus, Boolean Algebras, predicate calculus"...
Jun3-11 10:55 AM
2 1,026
I have a question on the book "Mathematical Logic: Propositional calculus, Boolean Algebras, predicate calculus" by...
Jun3-11 11:52 AM
5 1,248
If \mathbb{Z} is the set of integers, what does \mathbb{Z/2Z} mean?
Jun4-11 08:40 PM
5 2,308
Let's say I have a very large number of objects with some property which is Normally distributed. If I choose a subset...
Nov12-11 02:03 AM
10 1,850
I have a set a of stars, each of which have a magnitude in the K band ( K ) and a 1 sigma uncertainty ( dK )...
Feb22-12 12:26 AM
Stephen Tashi
9 1,311
Hi all Im hoping someone here can help me out. I'm developing a game and I have a dice system I'm using but I am...
Nov9-11 10:51 PM
Stephen Tashi
1 1,240
I am going to read 10 books in a certain period of time. The number of pages of the books varies between 40 and 1000...
Aug5-04 09:31 AM
4 1,305
In the statement P -> Q , Q is necessary for P. I just don't get it ,why don't we say P is necessary for Q, can you...
Jul24-04 12:51 PM
6 15,798
How many combinations of three letters from the letters A,A,B,B,C,C,D are ther? ------------------------------ I...
Jan26-05 09:48 PM
4 2,642
I'm quite confused bout lognormal distribution and normal distribution Consider a three-span continuous beam. All...
Dec5-04 10:51 PM
0 3,383
Could someone explain to me the simple rules of adding subtracting multiplying dividing Normal and lognormal...
Dec7-04 02:24 PM
1 5,667
hi, the problem i have is this: consider a line segment L of length d in R^3. the projection of the endpoints of L...
May15-10 10:08 AM
0 1,118
hi all, the situation is this: i have a conditional PDF f_{X|(D,S)}(x|d,s) and the unconditional PDFs D and S,...
Jul1-10 07:38 AM
9 3,080
hi all, i would appreciate any help you can offer for the following problem. consider coordinates x_1, x_2 in the...
Nov23-11 09:13 PM
9 1,869

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