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

Feb2313 09:25 AM
micromass

1 
32,009 
I'm browsing around waiting for my books to arrive, and I came across this (PDF) site that says \forall x P(x)...

May1111 01:47 PM
xxxx0xxxx

6 
9,287 
I've been given the question:
In a photographic process, the developing time of prints may be looked upon as
a...

May1011 06:19 PM
mathman

1 
1,417 
I have a question. Let's say I wanted to estimate the median income of all adults in my church. So I randomly select...

May1011 06:02 PM
zli034

1 
1,012 
Hi,
Suppose that an ndimensional vector \mathbf{z}=\begin{pmatrix}z_1&z_2&\cdots & z_n\end{pmatrix}^T is...

May1011 09:54 AM
S_David

8 
5,144 
Consider the Uniform distribution (continuous) U(1,1) which has p.d.f. f(x) = 1/2 for 1 < x < 1 and 0 otherwise.
...

May911 10:16 PM
bpet

2 
1,863 
Give an example to show that if not assuming independence of X1, X2, ..., Xn it is possible to show that Var(1/n * sum...

May911 03:22 PM
squenshl

2 
760 
Hi all,
http://www.physicsforums.com/attachment.php?attachmentid=35247&stc=1&d=1304691641
In this question, I...

May911 10:53 AM
Stephen Tashi

2 
695 
Wrong thread.

May811 10:27 PM
squenshl

0 
444 
Hi, i have a couple of problems that im not sure about (i get the wrong answer for particular cases because the...

May811 08:27 PM
bpet

28 
6,856 
In how many ways can obtain polynomial from
http://im3.gulfup.com/20110505/1304543619801.gif
notes that c any...

May811 02:49 PM
matiasmorant

1 
711 
Hi everyone!
I really need your help if you are good in time series. I have a problem on moving average...

May711 11:49 PM
Stephen Tashi

1 
831 
I am trying to compare two groups (for statistical significance), a control and a treatment group across more than one...

May711 07:49 PM
Stephen Tashi

1 
2,832 
Hey guys, this is just a problem I have been playing around with in my spare time, but it occurs to me that someone...

May711 07:36 PM
awkward

9 
5,351 
Trying to prepare for an exam...
4)
Let f : A > B be any function from the set A to the set B. How is the...

May711 05:54 PM
SW VandeCarr

4 
970 
Should Say Intervals.. I'm tired...
I am probably going wrong somewhere but I am running into problems with...

May711 11:16 AM
SW VandeCarr

4 
1,312 
Hi all,
I am now doing revision for one of the statistics module.
I am having some difficulty to proove the...

May611 09:13 AM
ghostyc

4 
4,646 
sorry, i am new here and did not read the regulations.

May611 04:51 AM
yasharea

0 
1,483 
I'm used to the notation f : X > Y for a map, where X and Y are sets. I recently came across this notation for a map...

May611 01:43 AM
Rasalhague

2 
1,442 
I have a Markov chain with an absorbing state and wish to calculate the expected time to absorption. If A is the...

May611 01:16 AM
bpet

0 
1,028 
correct me if I'm wrong, but the set of Natural numbers and the set of all positive even numbers have the same number...

May511 08:50 PM
SW VandeCarr

1 
966 
Let's define S as a 'normal' set if \neg(S \in S). Now let's look at the set of all normal sets N. If N is normal,...

May511 08:31 PM
eczeno

10 
3,834 
HI guys, i am actually a student in a engineer school in finance from France and i have some difficulties to...

May511 02:52 PM
kelyos

0 
830 
I'm writing a program that generates every possible valid Mastermind code.
That itself is easy. There are 6 colors...

May511 02:24 PM
Hurkyl

4 
988 
Greetings,
Maybe I'm getting a little bit confused, but I'm looking for resources which explain how to update...

May511 11:26 AM
SW VandeCarr

3 
1,438 
I have a dataset in R. What I want to do is simulate a variable that holds the same distribution. How do I do this?

May411 08:50 PM
dslowik

8 
2,874 
Now, I'm interested in all sorts of math, but currently I'm really liking statistics. However, I don't have any...

May411 01:31 PM
micromass

3 
2,026 
Hello!
Hope someone can help me, I already tried some solutions, but couldn't come to a final conclusion.
I need...

May411 10:07 AM
Stephen Tashi

9 
1,694 
In my lecture notes on confidence intervals the lecturer wrote this:
I don't understand the notation of that...

May211 12:43 PM
Stephen Tashi

4 
1,904 
Hi,
I am trying to estimate variance for negative Binomial distribution using
maximum likelihood estimation and...

May211 06:40 AM
QuendeltonPG

2 
1,527 
I'm trying to calculate the inverse CDF of wrapped Cauchy distribution using Mathematica but it gets me nowhere....

May211 12:41 AM
bpet

1 
1,471 
I'm currently having trouble trying to explain a coin toss and it's probability to a friend.
The question is
A...

May111 05:39 PM
jeebs

3 
1,253 
Hi guys,
I have a question re: random numbers and probability. If I have a random number generator that generates a...

May111 04:10 PM
Mquest

2 
1,369 
I keep reading explanations that say things like "the mean is normally approximated" but I don't know what that means....

May111 10:31 AM
Stephen Tashi

3 
1,314 
Suppose we have two hypotheses H1 and H2. We also have a potential conclusion C. We know all prior probabilities...

May111 10:16 AM
Stephen Tashi

1 
707 
Hi all:
I'm looking for how to perform MANOCOVA in R packages. Only found MANOVA.
Any idear?
zli034

Apr3011 09:08 AM
zli034

0 
480 
Let's say I have a big, 50sided die, with values ranging from 150. I want to find the exact standard deviation of...

Apr2911 06:17 PM
mathman

5 
5,353 
For multivariate normal distributions, Isserlis' theorem gives us moments in terms of crosscorrelations, e.g.,
...

Apr2911 01:58 PM
marcusl

1 
1,348 
Let X be geometric parameter p.
(b) Compute the CramerRao lower bound for the variance (MSE) of an unbiased...

Apr2911 01:15 PM
lildrea88

0 
1,568 
Every so often I return to the idea of structures as used in logic & clean up my ideas
about them, here is my latest...

Apr2811 08:35 AM
sponsoredwalk

7 
1,547 
Hey guys,
So i'm having trouble telling what the integration bounds should be when calculation the marginal PDF of...

Apr2811 12:23 AM
Stephen Tashi

1 
1,394 