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Set Theory, Logic, Probability, 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 32,734
Hi I am asking, if I am trying to make inference using Bayes rule based on a prior probability that is a random...
Sep17-09 02:58 PM
winterfors
1 1,318
Let the p.m.f. of M be defined by f(x)=x/8,x=1,3,4. What is the mean of M? Is this the same an E(M) of a binomial?
Aug28-09 10:35 AM
g_edgar
1 841
Hello Forum, usually the Pearson coefficient is meaninful to find the linear relationship between two variables....
Aug30-09 10:24 PM
wofsy
1 3,240
Dear Reader, I am writing for information, or a point towards any information about the calculation on the...
Sep2-09 04:32 PM
mathman
1 921
Show that (\neg B \wedge (A \Rightarrow B)) \Rightarrow \neg A is a tautology. I tried a truth table and found this...
Sep11-09 09:51 PM
dcramps
1 975
I am taking an "introduction to probability" class and there is a question (related to calculus) that the professor is...
Sep11-09 11:07 PM
Roni1985
1 693
Hi there, I have a question about an assignment I got from school. They were initially 12 assignments, I've...
Sep13-09 11:42 AM
Sander1337
1 3,984
Dear All, Having trouble with a seemingly simple logic truth table. Are these answers correct? ...
Sep14-09 12:45 AM
JCVD
1 5,316
Prove Fn ≤ (7/4)n for all n, 0≤n Fn = Fn-1 + Fn-2 Let P(n) be true for some n = k, for 0≤k Let n = k+1 ...
Sep15-09 08:27 PM
HallsofIvy
1 4,335
I'm trying to understand the difference between these two algebraic structures. An algebra is a collection of...
Sep17-09 11:43 AM
Preno
1 5,647
I have a Poisson-based question that I am not sure how to approach and solve. A processor receives groups of bits with...
Sep19-09 04:39 PM
scg4d
1 978
Hi, I have a situation where I want to define a function over all possible rings. For example, I would like to...
Sep18-09 05:04 PM
Preno
1 1,581
Human body temperatures are normally distributed with a mean of 98.20 and a standard deviation of 0.62. Find the...
Sep18-09 06:58 PM
EnumaElish
1 1,322
Hello, Suppose that we have two sets of random variables, which are arranged in an ascending order as: ...
Sep25-09 08:50 AM
bpet
1 739
Human body temperatures are normally distributed with a mean of 98.20 and a standard deviation of 0.62. Find the...
Sep19-09 05:02 PM
HallsofIvy
1 4,065
How can I prove <by induction> the following De Morgan laws are valid for all n >= 2 - ( P(d1) ^ ... ^ P(dn) ) = (...
Sep24-09 09:46 PM
Ben Niehoff
1 1,679
Hi everyone I built a 4 bit asynchronous counter:...
Oct5-09 01:31 PM
Kenneth Mann
1 4,097
Show that these statement about real number x are equivalent (i) x is rational (ii) x/2 is rational (iii)3x-1is...
Sep27-09 01:36 PM
Office_Shredder
1 706
A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow...
Sep27-09 05:04 PM
statdad
1 1,926
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully...
Sep27-09 03:13 PM
EnumaElish
1 2,195
Does anyone know how to create a matrix of complex Gaussian noise (with unit power = 1 and mean of zero)? I need to...
Sep30-09 02:52 PM
farful
1 13,557
I am having trouble with what seems to be a simple combinations or permutations problem as follows: Melodies for more...
Oct2-09 06:45 PM
mathman
1 3,524
how do i show that a markov chain is irreducible?
Oct7-09 02:55 PM
EnumaElish
1 5,247
I'm just curious as to how to prove that a Bernoulli distribution probability function is valid (ie. that it is indeed...
Oct8-09 11:03 AM
bpet
1 1,276
Let ∑ be the variance-covariance matrix of a random vector X. The first component of X is X1, and the second component...
Oct10-09 07:34 PM
statdad
1 7,754
I have a scatterplot X is just 30 given values. Y is 2*X + eps, where eps is a random figure. The Plot is Y vs X I...
Oct13-09 06:46 PM
statdad
1 768
The problem statement, all variables and given/known data There are w white balls and b black balls in a bowl....
Oct15-09 06:42 AM
bpet
1 1,420
Could anyone help me evaluate the integral ...
Oct17-09 05:02 PM
mathman
1 849
Hi everybody! I have a random iid sample Xi, i=1, ..., n The empirical cdf of the sample at poin s is ...
Oct18-09 10:07 AM
EnumaElish
1 3,307
In the metatheory of Sentential Logic, what is the difference between saying P is T on \alpha vs. \alpha(P)=T...
Oct18-09 10:28 PM
honestrosewater
1 1,084
So I have a test tomorrow and this question is in a list of review questions and I'm having trouble remembering where...
Oct20-09 01:02 AM
Office_Shredder
1 6,425
I have been trying to figure out the proof to this problem for the past couple of days and still don't have an answer....
Oct21-09 10:11 AM
g_edgar
1 845
Hi, I have a regular OLS regression that includes a variable both by itself and squared (i.e. y=b0+b1*x+b2*x^2). I...
Oct22-09 02:19 PM
EnumaElish
1 4,397
From my extremely small and inadequate knowledge of stochastic processes (and Wikipedia): A stochastic process is a...
Oct25-09 03:36 AM
bpet
1 1,649
A calculator has an eight -digit display and a decimal point that is located at the extreme right of the number...
Nov4-09 06:08 PM
tiny-tim
1 2,595
The basic idea is this. You get to roll 5 or 6 12-sided dice (d12). For any 12's your roll, you every 12 you roll,...
Oct30-09 11:03 AM
Pere Callahan
1 2,093
hello i have given this problem to find pdf of function z.i have solved most of it and stuck at the end. i have...
Nov3-09 09:59 PM
zli034
1 949
hi i have an exam after 1 week and while i was studying i found this simple problem but i couldnt answer it as the...
Nov5-09 04:21 AM
HallsofIvy
1 757
Hi, I have a data set where temperature and precipitation were monitored for a series of days at 5 ephemeral...
Nov5-09 09:41 PM
bpet
1 1,236
Let X be a continuous random variable with P(X>x)=e^-ax, x less/equal 0 Where a is a positive constant. Find EX...
Nov5-09 04:13 AM
HallsofIvy
1 2,214

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