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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
micromass
1 27,635
I've been reviewing probability and came across this problem: A penny may be fair or it may have two heads. It's...
Dec15-05 05:40 PM
Hurkyl
14 1,823
A friend gave me this problem; it's been years since I've taken probability, and I'm really rusty. I'm curious how to...
Nov21-06 12:15 PM
EnumaElish
3 3,979
I don't think I *really* understand the Central Limit Theorem. Suppose we have a set of n independent random...
Jan22-07 05:41 PM
HallsofIvy
3 2,189
I'm trying to compare fits to data in a certain way. I start with the initial data and fit and compute the \chi^2...
Oct17-11 09:12 AM
cahill8
0 891
I'm dealing with a histogram and want to use poisson errors for each bin. For example, having 7 items in a bin gives...
Aug1-11 10:24 AM
pmsrw3
1 1,298
...I understand why it becomes more and more insignificant as the value of n increases, but what is the purpose of...
Feb10-12 10:37 AM
Stephen Tashi
5 7,318
Hi! I am trying to figure out all possible combonations for 6 items among a group of 18 choices. So I turn to my old...
Nov15-11 05:15 AM
chiro
2 1,059
What were the chances that Paul the octopus predicts winners in 7 matches in a row? Assuming that teams are of equal...
Jul12-10 06:11 PM
SW VandeCarr
5 1,861
guys im bit confused with the statement borel cantelli lemma 2 : "If the events En are independent and the sum of the...
Jun23-12 01:21 PM
calios
2 734
If I were to use a two-tone image e.g. fax, and were to transmit it line-by-line, where the the individual pixels...
Dec18-07 08:38 PM
EnumaElish
1 1,730
I am aware that, in statistics, things get difficult as soon as they get nonlinear. And taking the reciprocal of a...
Jul3-12 02:28 AM
DrDu
38 3,373
I know how to calculate the probability of getting a 1 and then 2 or 1 and 1 and etc, that's just 1/6 * 1/6 Now...
Apr18-12 04:06 PM
calvinjhfeng
2 1,143
Ive never been taught functions using sets and I have been told that to really understand the real meaning of them it...
Jan22-09 02:14 PM
cam875
5 3,545
i was confused about what the cardinality of the set {1,2,2,3,3,1,1,1} is? is it 8 or is it 3?
May3-10 08:25 AM
g_edgar
2 737
okay so i have looked up things online and they when other ppl explain it it still doesnt make sense. im working on a...
May13-10 05:34 PM
Fredrik
7 2,438
Hi guys, I'm new in this forum, so i hope you can help me with these problems. It might be easy, but i just started...
Oct25-04 10:59 AM
NateTG
1 1,308
Hey! Just as the title suggests I am looking for a good book on stochastic processes which isn't just praised...
Aug7-12 03:58 PM
dvchench
3 4,165
Hi, Can someone plz solve this sum either by drawing a rook diagram or any other way the question goes like:...
May5-05 12:55 PM
campa
6 1,050
If there is a box which has 7 red balls, 4 white balls and 9 black ball and you take 3 balls out what is the...
May5-05 09:53 PM
campa
3 1,312
Ok well here goes. what is teh chance of flipping a coin 10 times and getting either 10 heads or 10 tails. Once this...
Jan19-05 01:19 AM
Chronos
6 5,205
Can all logic be stated in mathematical equation? If so, I'm not sure how you would state cause and effect.
Apr27-07 04:36 PM
Hurkyl
1 1,158
My apologies if the following is a stupid question. But is the empty set disjoint with itself? Certain aspects of...
Sep16-09 04:51 PM
g_edgar
2 2,892
Suppose X and Y are continuous random variables with the joint pdf f_{xy}(x,y) on the \times square. Is the...
Oct23-10 04:57 PM
mathman
5 1,166
Hi everyone, here's a probability problem that seems really counter-intuitive to me: Find four random variables...
Dec13-10 04:19 PM
mathman
2 2,491
Hi everyone, I came across a problem that requires knowing this fact. But can any open set in R^n be expressed...
Jun4-11 04:48 PM
CantorSet
5 4,157
Hi everyone, I'm confused about Durrett's formal definition of a random variable, as well his formal notions of...
Jun6-11 04:13 PM
disregardthat
1 1,035
Hi everyone, I have a feeling the following property is true but I can't find it stated in any textbook/online...
Aug11-11 12:14 PM
CantorSet
5 2,149
Hi everyone, Someone posed the question: and Marilyn (high IQ record holder) answers:
Mar30-12 10:43 PM
chiro
144 20,732
Hi everyone, This is not a homework question. I just want to understand an aspect of linear regression better. ...
Aug27-11 11:50 PM
Stephen Tashi
3 2,300
Hi everyone, This is not a homework question but something I thought of while reading. In the method of...
Aug31-11 07:15 PM
CantorSet
3 1,398
Hey all i struggling to understand, these concepts. would some explain to me the relationship and differences the...
Feb19-10 04:18 PM
mathman
1 2,696
Why does a distribution function F_X have to be right continous ? is'nt just making sure it is non-decreasing enough
Mar11-10 03:58 PM
mathman
1 675
I just beginning to study measure theory. so far from what i understand so far , can we say in general, an integral is...
Apr26-10 04:10 AM
winterfors
4 1,135
so a charateristic function of a RV is complex valued funtion. from my lecture, the distribution funtion of a Random...
Mar27-10 04:03 AM
SW VandeCarr
3 877
measure spaces and random variable are still fuzzy to me although i'm starting to see how random variable are s used,...
Apr14-10 11:35 AM
cappadonza
0 636
suppose we have random variable defined a function of another random variable such that Y = \mathbb{E}(X) it seem...
Apr17-10 04:15 PM
mathman
1 1,627
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
EnumaElish
1 569
this is not a homework question, it was a interview question Question: suppose we keep flipping an unbiased...
Jul10-10 08:54 PM
SW VandeCarr
21 3,968
Hi context: i am trying to understand convergence of sequence of random variables. random variable are just...
Aug6-10 04:31 PM
cuak2000
2 5,111
Hi all I am struggling to see the difference between Convergence in probability and Almost surely convergence of a...
Sep6-10 06:43 AM
Fernsanz
4 4,342

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