Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:25 AM
micromass

1 
27,677 
I was just playing some solitaire (the card game version) and realized that I come across the situation where the game...

May313 12:44 AM
BillTurlock

12 
5,319 
If we commonly draw a distribution of data, we should be careful to chose appropriate classes, for instance,
12, 4 ...

May213 02:57 PM
exponent137

6 
562 
Okay I got to wonder about this: Why is the multinomial coefficient independent of if you start by taking out n1, n2,...

May213 01:50 PM
Vargo

1 
376 
What's the difference between convolution and crosscorrelation?
I read the answer below, but I don't know enough...

May213 01:39 PM
MarneMath

5 
473 
Suppose there are two urns: in urn A, there are r red balls and w white balls. In urn B, there are b black balls.
...

May213 01:37 PM
mfb

1 
341 
Let X1, X2, X3 be three random variables. Suppose all three have mean μ and variance 1. The sample mean is Y = (X1...

Apr3013 06:13 PM
ellyezr

5 
662 
So, as far as I know, there are two χ2tests: "test for fit of a distribution" & "Test of independence"
How big of...

Apr3013 02:07 PM
Stephen Tashi

3 
517 
I need some advice,
What could it possibly mean, in an article I am studying, where the results of a test...

Apr3013 06:06 AM
Drudge

8 
596 
I have N random variables (x1,x2,...,xN) following a Dirichlet distribution with parameter vector (1,...,1). That is,...

Apr3013 04:37 AM
PAHV

0 
340 
Hi friends,
I have an idea what a markov chain is. But when it comes to HMM (hidden markov model) I...

Apr2913 10:24 PM
dexterdev

2 
421 
came up with a different answer than someone posted on this, what do you all think?
Say you have one bacterium now....

Apr2913 01:17 PM
BWV

11 
573 
I have a hard time understanding/justifying the proper usage of "vacuously true" starting points in set theory...

Apr2913 10:44 AM
Stephen Tashi

16 
901 
Where do numbers come from? What is the logical basis for the existence of numbers?
Are numbers defined in...

Apr2913 08:53 AM
exponent137

24 
1,432 
I need your opinion/help, guys.
Wellknow American logician H. Curry once expressed the opinion that in spite of...

Apr2813 07:48 PM
Fredrik

58 
3,358 
Hi, I am new here, and my name is Jonas. I'm a CS major at a university in the Northeast US. I'm a senior and wrapping...

Apr2813 03:21 PM
JonasJSchreibe

8 
444 
So I am looking for some insight one how I might go about solving this problem.
I have two equations f and g where ...

Apr2813 01:33 PM
polpol

5 
473 
Hello, could somebody please explain to me how
1exp(μt) ≤ μt
and similarly
(1exp(μt))exp(λt) ≥...

Apr2813 10:40 AM
stukbv

2 
305 
This is (perhaps) a tricky question regarding the moment of normal distribution.
Let f(x) be the pdf of normal...

Apr2813 10:38 AM
Hejdun

9 
727 
Hi there,
So regular i thought that the procedure was
F(s) = ∫s0 f(x) dx
However i am doing a problem with a...

Apr2713 06:25 PM
JoshMaths

4 
373 
So I"m doing a lot of probability problems with CDF and although I know how to calculate it, I dont quite know what I...

Apr2613 11:27 AM
Stephen Tashi

2 
609 
Let v be a random variable distributed according to F(.). Let X be a set containing the objects x1 and x2. Suppose
...

Apr2613 02:31 AM
haruspex

4 
436 
Hello everyone. I am trying to determine the Shannon entropy of the string of letters QXZ, taking into consideration...

Apr2513 08:45 PM
awkward

2 
535 
Statement: If every right triangle has angle defect equal to zero then the angle defect of every triangle is equal to...

Apr2513 04:56 PM
Fredrik

2 
439 
fXY(x,y)=2 if 0<x<1 and x<y<1, 0 for other intervals
I have to calculate: P((x>0.5)π(y<0.5)).
I think it 0 but im...

Apr2413 02:42 PM
mathman

1 
464 
I hope this is in the right place, it feels like calculus, but it's the last part of my analysis problem.
...

Apr2413 03:53 AM
mfb

1 
402 
Hello,
i have the following conditional distribution
fXY(x,y)=2, of 0<x<1 and x<y<1
When i calculate the marginal...

Apr2413 03:50 AM
chiro

11 
438 
Alright so I posted a picture asking the exact question.
Here is my best attempt...
According to my professor's...

Apr2313 12:20 AM
Alekon

3 
525 
Hi,
I'm trying to find a probability distribution (D) with the following property:
Given two independent...

Apr2213 03:13 PM
mathman

3 
517 
Dear all,
I am using some software to perform a twosample Kolmogorov–Smirnov test. Specifically, I am testing the...

Apr2213 01:58 PM
Stephen Tashi

1 
610 
Hi all:
The inequality here involves abs, and max functions, how to solve for the interval as show below?...

Apr2213 12:38 PM
CompuChip

1 
374 
Hi
Usually I'm used to dealing with symmetric distributions with mean at 0, but one has come up that cannot take...

Apr2213 07:57 AM
mikeph

1 
384 
I'm having trouble conceptualizing taking the difference between the empty set and itself. There is no element x where...

Apr2213 02:08 AM
MathematicalPhysicist

3 
567 
The expositions for a normal probability plot (aka normal quantile plot) (in which observed probabilities are plotted...

Apr2113 02:06 AM
nomadreid

5 
465 
Hi everyone,
I have the following exercise.
Fx(x)=0, x<1 or x>1
Fx(x)=1/2, x=
g(x)=x^2+1  this is the function...

Apr2113 01:24 AM
Stephen Tashi

3 
464 
In an exposition about the modal logic system K4, after introducing the box "necessity" quantifier \Box (where \BoxP...

Apr2013 11:02 PM
nomadreid

5 
507 
{x\inZx=2m+1, m\inZ}
Is this saying that x is apart of all integers and because of that x=2m+1 where m is all so...

Apr1913 08:19 PM
Mark44

2 
454 
First let me apologise for the improper use of 'groups'. I'm not a mathematician but I know that 'groups' means...

Apr1913 07:37 AM
ArcanaNoir

4 
451 
The differences in the following versions of the ChurchTuring thesis
1) any algorithmic process can be simulated on...

Apr1913 01:06 AM
Simon Bridge

3 
471 
This is a question out of model theory. (This preamble is due to the fact that "model" and "theory" are used in...

Apr1913 12:07 AM
nomadreid

8 
620 
For some time now I've been trying to figure out probably for a problem of the following form.
Say a criminal...

Apr1813 03:54 PM
mathman

3 
382 