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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 32,456
I know that function is a type of relation. What i acctually need to know is that; Are these relations Equivalent all...
Feb23-13 08:50 AM
micromass
1 474
i would like to have some help here.. it is a problem in probabilities i can not find anyway to start finding the...
Feb23-13 06:22 AM
tiny-tim
14 330
I have a crooked line of data points,want to project data on the straight line.If I go standard least-square...
Feb22-13 07:53 PM
chiro
1 545
\exists{x}(P(x)\Rightarrow{Q(x)})\equiv{\forall{x}P(x)\Rightarrow{\exists{x}Q(x)}} I am able to derive this...
Feb22-13 01:10 PM
mfb
3 579
Hi All, I often see this term when factorizing out a matrix from brackets A(some other term)A^T where I...
Feb22-13 12:42 PM
MikeLowri123
2 513
I have trouble disproving the following expression I worded it as follows: The product of certain number and...
Feb22-13 08:56 AM
Bashyboy
2 629
My statistics professor wanted me to remember an infinite series sum, but i cant remember what it was i think it was...
Feb22-13 08:38 AM
mfb
1 445
Batter A has a batting average (probability of getting a hit) of .320. Batter B has a batting average of .280. If...
Feb21-13 07:08 AM
shadedude123
2 951
Hi everyone, I have a plot of some data points that have error bars on the y axis. A bit of software I am using...
Feb21-13 05:58 AM
kop442000
4 805
Hello, I am trying to quantify the difference between two discrete distributions. I have been reading online and...
Feb21-13 12:13 AM
ImaLooser
4 979
I have been trying to teach myself some category theory, and have been working through some proofs. I didn't...
Feb20-13 11:39 PM
Jim Kata
0 413
Hey all I have what I assume to be a fairly vague question. I'm taking a programming class right now for MATLAB and...
Feb20-13 04:32 AM
CompuChip
2 999
Hello my name is Andy I'm in highschool, and I have a bit of a confusion or lack of information. Ok so I have been...
Feb20-13 03:28 AM
Simon Bridge
1 664
Hello PF This might be a fairly simple question to most of you, but I was given this problem (don't worry, I...
Feb20-13 01:47 AM
ImaLooser
2 1,977
I know that there are many web-sites that explain Pearson's chi-square test, but they all leave the same questions...
Feb19-13 07:58 AM
nomadreid
4 1,087
Hi all, Just checking my answer in the following problem. Suppose 100 women with a probabilty P of getting pregnant...
Feb19-13 05:36 AM
Stellaferox
0 427
Hello, How would you/or is it possible to combine two transitional probability matrices? Say for example I...
Feb18-13 08:07 PM
chiro
65 8,708
Let's say that I'm playing a card game with 3 friends. The game involves a full deck of regular playing cards (52...
Feb18-13 04:35 PM
awkward
2 762
The page are under the attachment. How to solve the Harry drives cross-country problem without technical symbol but...
Feb17-13 12:28 PM
Alan Lui
0 803
Given a sample of a normally distributed population, then the sample variance ≈the population variance divided by the...
Feb15-13 07:55 AM
nomadreid
5 881
I realize you can transform the data in many ways, but I really can't find a method to solve this particular scenario...
Feb15-13 06:04 AM
ssd
6 1,217
I'm putting together a lab report and my result is off from the known value by 1.43 σ. According to the error...
Feb15-13 05:49 AM
ssd
6 629
I've seen in some probability theory books that the classical definition of probability is a probability measure, it...
Feb14-13 12:25 PM
ssd
8 1,259
##S = \bigcup _{i=1}^{∞}\left\{{0,1}\right\}^i ## methinks yes because: ##S = \bigcup...
Feb13-13 10:46 PM
Bachelier
6 876
See attachment for the question. ---------------- ∀x ∈ D, if P(x) then Q(x). this means ∀x P(x) -> Q(x). all you...
Feb13-13 09:01 PM
persian52
5 1,142
Hi all , here's hoping someone could help me with this problem. :) The problem is basically as follow: You have...
Feb13-13 03:29 PM
mathman
9 1,328
Dear all , Thank you for any help in advance. I have a graph in Excel which represents counts (photons) vs pixel...
Feb13-13 02:10 PM
ssd
2 1,313
Hello, I just have a quick question understanding multiple comparisons and I'd appreciate any help because I'm on the...
Feb13-13 02:02 PM
ssd
3 680
I am coming across hiccups in my proof process. I am given this problem - Prove: if n is an integer and 3n + 2 is even...
Feb13-13 01:35 PM
ssd
7 1,413
Dear All Salam I tried to make the derivation of the Auto correlation time difference dependency for the 2nd...
Feb12-13 03:25 PM
mathman
1 542
http://i48.tinypic.com/244tkkj.png In this game you roll six dice. After each roll you must take at least one die...
Feb9-13 10:00 PM
Simon Bridge
3 812
Hi, Someone I know tried to convey me the meaning of {ℝ}, stating it represents a set of real numbers. But using...
Feb9-13 10:30 AM
kokolovehuh
7 947
Hi all, I am trying to figure out 1) What to call my problem so I can better research the literature, and 2) see if...
Feb8-13 01:09 PM
AlephZero
2 623
Two mariners report to the skipper of a ship that they are distances d1 and d2 from the shore. The skipper knows from...
Feb8-13 12:23 PM
jbriggs444
4 644
Hi Guys, Im doing my work placement at a steel processing facility and have been asked to derive a formula for...
Feb8-13 10:46 AM
nvn
8 694
Hello, Hello, I have recorded some discrete data with an unspecified distribution. I have generated some...
Feb8-13 07:42 AM
bradyj7
0 809
Hey I have kind of a general question. In my text book, there are lots of questions that go something like this: ...
Feb7-13 09:04 PM
Simon Bridge
1 493
I have a vector signal, \underline{x}(t), which is afflicted with Gaussian noise \underline{n}(t). I take a finite...
Feb7-13 06:39 PM
chiro
1 601
Hi, Letting W be a standard brownian motion, we define the first hitting times T_{a}=inf\{t:W(t)=a\} with a<0 and...
Feb7-13 06:04 PM
mathman
4 907
For binomial distributions, how can you tell which central tendency value (mean, median, or mode) and which...
Feb7-13 10:59 AM
Stephen Tashi
3 556

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