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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 27,668
Every body knows that: x_{1}^2+x_{2}^2........x_{n}^2 =0\Longrightarrow x_{1}=0\wedge x_{2}=0........\wedge...
Jun1-10 03:31 AM
1 954
If Y1,Y2,Y2 ~ Multinomial with parameter (n,p1,p2,p3) Prove that the conditional distribution of Y1 given Y3=m (m<n)...
Jun7-10 07:04 PM
1 1,780
Hi, I'm struggling to find a constructive proof (through natural deduction) of the material implication replacement...
Jun4-10 10:03 PM
1 2,454
An expression of the compactness theorem for sets of sentences is that: let T be a set of sentences in L. Then T has a...
Jun6-10 06:26 PM
1 1,200
Hi, I've been trying to get my head around z and t statistics. and I almost have a matra in my head that "when the...
Jun9-10 08:09 AM
1 1,712
I am having trouble with this study question for my final: A function from the real numbers to the real numbers is...
Jun9-10 02:28 PM
1 1,107
As it says in the title, will anyone please give me the equation (in pre-algebraic terms) for discrete choice...
Jun11-10 05:25 PM
1 1,688
Hello Buddies, I need to calculate "covariance matrix" of the given joint PDF function. Joint PDF is...
Jun10-10 11:46 AM
1 2,769
Hi, if I have some spread over a very small range of binned values, how can I test if the distribution is normal....
Jun10-10 05:49 PM
1 754
Hi this is more of a set theory question really, i'm a bit confused, say \mathcal{F} is collections of sets, and...
Jun15-10 09:25 AM
1 569
This is not a tutorial, but I thought I'd post a link to a Webpage dedicated to calculating the probability that two...
Jun15-10 02:01 PM
1 2,289
I just found a graph that uses 2006 data to estimate the probability of obtaining an offer that is at least the target...
Jun17-10 09:49 PM
1 3,271
I have a question on the chances of winning a lottery: If you buy 10 tickets in a lottery where the odds of you...
Jun19-10 03:25 PM
SW VandeCarr
1 1,000
Hi I am currently reading: ...
Jun20-10 05:23 AM
SW VandeCarr
1 1,099
Hello all, I have the following question: Assume (\Omega, \mathcal{F},P) = (,\mathcal{B}(),\lambda), where...
Jun20-10 09:52 PM
1 704
hi i just need a simple yet uncomplicated proof for (A UNION B)'S COMPLIMENTARY=A' INTERSECTION B'
Jun20-10 04:56 AM
SW VandeCarr
1 1,044
A and B play a game of golf ( where the player with the lowest score wins). The deck is divided so that 17 cards goes...
Jun21-10 02:43 PM
1 1,565
I am familiar with the derivation of the probability density function of the sample mean but was looking for an...
Jun21-10 02:01 PM
1 758
If I hypothesize that 70% of all my future coin tosses will come up heads, and I sample 15 coin tosses and get 13...
Jun26-10 12:36 PM
1 877
Hi. I have the following problem I am finding very difficult to solve. Assume that the lifetime T is an r.v. that...
Jun24-10 06:23 PM
SW VandeCarr
1 1,803
Hi: I want to know the quadratic covariation of Brownian motion B(t) and poisson process N(t).Is it B(t)? ...
Jun24-10 06:23 PM
1 1,967
Thanks everyone!:) My Answer: If I understand it right, since there are 3 dice, the probability that any of the...
Jul1-10 06:59 PM
1 918
Hi all, I am stumped on how to achieve this with the data I have. My PI thinks there is a way, but I can't seem to...
Jul2-10 12:24 PM
1 834
How would I calculate the probability of getting a royal flush in a game of Texas Holdem with 9 players sitting on a...
Jul4-10 09:02 AM
1 970 What does "standardized cumulant" mean? It becomes clear in the...
Jul6-10 04:05 PM
SW VandeCarr
1 1,627
On this website (,...
Jul5-10 09:54 PM
1 2,198
Hi. I am going to have my Multivariate Statistics exam in two weeks. I am going by a book that isn't available in...
Jul7-10 01:42 PM
1 1,729
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 1,213
Hello all, I have the following question regarding the interchange between union and intersection. \cup_{q <...
Jul20-10 03:31 AM
1 1,196
Hello, I am trying to find a clean solution for this (i.e. straightforward and academically acceptable). I...
Jul21-10 09:55 PM
1 680
sum_{i=k}^{n} {i \choose k}i^{-t} ...
Jul27-10 07:22 AM
1 1,318
Hi, I'm having a little trouble with this question: Among entering students at a certain college, the men averaged...
Jul22-10 12:57 PM
1 11,645
Does anybody of you know about this problem and how to compensate for it?
Jul23-10 01:42 PM
1 674
I'm stumped on what seems to be a simple proof question, but I don't know what to do. Question: (c) Show that the...
Aug4-10 02:19 AM
1 3,534
what is the single axiom and rules of inference??
Aug2-10 11:34 PM
1 864
How to prove the variance of the t distribution?
Aug6-10 07:59 AM
SW VandeCarr
1 2,586
i need full working out process... thanks for helping me :) 1. Let X be a random variable with PMF x 0 1 2 3 4...
Aug8-10 06:44 AM
1 878
I encountered a problem related to merchandise allocation. We are given the present available quantity of an item and...
Aug9-10 10:49 AM
1 1,364
I have N people and each of them has a uniform probability to belong to one of M countries. Now I wonder what is the...
Aug23-10 04:45 AM
1 1,246
This is my question: E1 = there is no rain E2 = concrete material production is feasible E3 = premix concrete is...
Aug18-10 04:46 AM
SW VandeCarr
1 1,304

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