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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
1 32,730
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
1 502
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
1 609
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
4 933
For binomial distributions, how can you tell which central tendency value (mean, median, or mode) and which...
Feb7-13 10:59 AM
Stephen Tashi
3 566
What would the cardinality of the set of all ordinal numbers be? Is it even known or does the question even make sense...
Feb6-13 06:25 PM
1 509
I have a rather technical question in boolean algebra to which I was not able to find an answer. What is the order...
Feb4-13 06:00 PM
3 3,485
Hey guys, I have a question of how to go about answering a question. I am trying to decide what coding/database...
Feb4-13 02:51 PM
1 541
Hi everyone. Yesterday I was thinking about probability and real life and about the fact that we always expect...
Feb4-13 03:59 AM
2 1,114
Suppose a box initially contains 1 red marble and 1 black marble and that, at each time n = 1, 2, ..., we randomly...
Feb3-13 03:28 PM
2 916
This isn't homework, just a combinatorics problem I came across. However, it is a textbook-style problem. So I'm...
Feb3-13 07:46 AM
3 1,479
Hello! I am using physical data to do an analysis (~30k measurements). These measurements include energies,...
Feb1-13 09:32 AM
5 2,901
This is a really basic point that I am getting held up on. In probability theory, we use PDFs and PMFs to describe...
Feb1-13 12:58 AM
Simon Bridge
4 802
Hello hello, I'm not looking just for an answer per say, but am also wondering the thought process in solving problems...
Jan31-13 02:10 PM
3 890
Dear Physics forum subscribers, I currently have a problem whereby I need to combine the magnitude and direction of...
Jan31-13 01:01 AM
Stephen Tashi
11 1,084
I was wondering what the typical approach is for creating a "mathematical object" such as the probability model...
Jan30-13 01:10 PM
2 861
Okay so I have a complex setup that I hope I can convey. I have 9 sites to which X can bind. 6 out of the 9 sites...
Jan29-13 12:11 PM
8 727
If we have calculated for three sequential bus stops bus headways distributions, passenger arrival distributions,...
Jan29-13 09:22 AM
Mark J.
0 617
rational number to count the next rational number from any rational number? We can count the next natural number,...
Jan29-13 08:01 AM
8 1,482
I was a bit confused with the pages that I attached... 1) "An intuitive estimate of \theta is the maximum of the...
Jan28-13 02:43 PM
6 1,144
In the page that I attached, it says "...while at the continuity points x of F_x (i.e., x \not= 0), lim F_{X_n}(x) =...
Jan27-13 07:23 PM
Stephen Tashi
3 978
Hello, This is not strictly a statistics forum, but I'm hoping you guys may have sufficient background to help me...
Jan27-13 08:23 AM
2 806
In risk, the attacking party rolls 3 die and the top two numbers of the 3 die rolled get put up against 2 die rolled...
Jan26-13 09:09 PM
4 1,158
Suppose that you have a probability distribution P of a parameter which, for simplicity, it is two-valued. For...
Jan25-13 02:46 PM
3 798
Lets say if g(n) is not an upper bound on f(n), then does that mean g(n) is a lower bound on f(n)? Can anyone help...
Jan24-13 06:40 PM
Simon Bridge
5 713
To capture the actual Rent amount 95% of the time, predictions from the fitted equation should include a margin of...
Jan24-13 05:34 PM
4 1,196
Form a team by choosing 4 persons among 4 women and 7 men. You need at least 2 women in the team. How many ways to do...
Jan24-13 04:32 PM
1 658
so i'm having problems with logic exercies especially when it asks you to prove long equations like when you just use...
Jan24-13 03:35 PM
2 668
I'm trying to understand Godel's incompleteness theorems. But I have a difficulty. Are they about any set of related...
Jan24-13 12:47 PM
6 1,044
Var(X)=\sum_{i=1}^N P(X_i)(X_i-EX)^2. Cov(X,Y) = \sum_{i=1}^N\sum_{j=1}^M P(X_i,Y_j)(X_i - EX)(Y_j - EY). If,...
Jan24-13 11:32 AM
5 1,111
Hello everyone, For homework my instructor assigned problem from the book. To show which problems to do she wrote...
Jan24-13 10:37 AM
1 502
I hope someone can put me on the right track here. I need to derive the infinitesimal generator for a bridged gamma...
Jan24-13 04:19 AM
6 1,245
Say given a simple acyclic directed graph with n nodes , which includes a starting node s0 and ending node e0 (i.e., a...
Jan23-13 03:18 AM
1 954
I'm interested in the question of defining a reliability parameter of a model of the probability of an event. Say...
Jan22-13 04:55 PM
7 942
According to the truth tables in my computer architecture text, P → Q is false if P is true and Q false; and true...
Jan22-13 08:54 AM
14 1,819
Hi, I try to teach myself Hidden Markov Models. I am using this text as...
Jan21-13 02:12 PM
4 1,285 Is this sufficient?
Jan21-13 12:58 PM
5 746
Does μx mean the same thing as E? Also, does σ2x mean the same thing as Var X?
Jan21-13 02:01 AM
2 1,116
Hello, I had a question about data which is represented by a fractal distribution. I know that the linear regression...
Jan20-13 08:44 PM
Stephen Tashi
7 1,408
This applies to natural numbers n and N where n<N. We have N balls representing numbers 1,2,...,N. We randomly...
Jan20-13 03:22 PM
8 1,154
Hi, I'm trying to use the kolmogorov smirnov test in in R to compare one distribution with another. I'm getting the...
Jan19-13 11:34 AM
Stephen Tashi
1 1,245

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