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

Feb2313 09:25 AM
micromass

1 
27,597 
Hello, I’m Charlie and I’ve been trying to understand how I prove things correctly. So here is an example of the way I...

Nov612 05:17 PM
charlie_sheep

0 
611 
Pretty much every proof of this I've seen uses the axiom of countable choice at some part or another, and I never got...

Nov612 04:19 PM
Erland

1 
752 
I'm wondering if there's an expression/correction for finding the entropy of a density using histograms of different...

Nov612 11:16 AM
Stephen Tashi

8 
1,236 
With a regular deck of 52 cards, how would you find the probability of getting the Ace of Spaces if you took turns...

Nov612 06:24 AM
IceXaos

3 
860 
Two dice are rolled. What is the probability that the first die is a perfect square and the second die is a 4?
...

Nov612 05:06 AM
alex.kin.

2 
677 
I am trying to investigate the statistical variance of the eigenvalues of sample covariance matrices using Matlab. To...

Nov512 07:38 PM
weetabixharry

11 
1,968 
What branches of mathematical logic are there? I've taken formal logic (that is, the logic where one has various...

Nov512 05:46 PM
ThoralfSkolem

2 
857 
In Joseph Dauben's book on George Cantor, his philosophy of the infinite and hsi mathematics...there is a section...

Nov512 02:10 PM
JT73

1 
602 
So my prof. has not replied to my email, so I was wondering if someone here can help me understand why the MLE for a...

Nov512 12:09 PM
Stephen Tashi

1 
913 
Hi there,
I'm working on a simulation of the travel patterns of cars. There are many variables and conditional...

Nov512 11:30 AM
bradyj7

2 
603 
Hi there,
This is going to be difficult for me to explain, so I will try my best. My statistics is kind of rusty......

Nov412 10:54 PM
Stephen Tashi

1 
801 
we know anything can happen in future.but when future becomes past only one event has actually occurred. so the...

Nov412 06:22 PM
nikki92

1 
653 
I was just wondering how exactly to appropriately modify the 1st and 2nd order stats when you want to weight a given...

Nov412 04:44 PM
X89codered89X

2 
600 
Given the following distributions I have to choose which one to use under the given scenario.
Distributions
...

Nov412 11:26 AM
theking7119

0 
578 
MGF of X denote M(x)=E exists for every t>0 . For t>0 Show p(tX >s^2 +logM(t)) < e^s^2 .

Nov412 11:25 AM
cutesteph

2 
845 
Hi!
I have an argument and I have to prove the validity of all possible ways.
I have proved by logical...

Nov412 08:56 AM
catala

0 
672 
Hi,
I'm fitting a distribution to the starting times of the first car journey in the day. I have a sample of 3,000...

Nov412 08:47 AM
bradyj7

2 
634 
Given that X(t) is a homogeneous poisson process with arrival rate λ, how do I perform the transformation:
...

Nov412 08:41 AM
gamerx

0 
670 
f(x,y) = (1/x) for 0≤y≤x≤1
A new rv Z=X+Y where X,Y not independent find the pdf of z
My approach
F(z) =...

Nov412 03:02 AM
bpet

1 
524 
X = # of clubs in a 13 card hand drawn at random without replacement from 52 card deck
Y= # of queens in the same 13...

Nov412 12:01 AM
chiro

1 
568 
Greetings,
In atomic spectra experiment I came across with error propogation in the nonlinear equation:...

Nov312 10:34 PM
haruspex

5 
980 
Why is the E^2 minimized when choosing f(x) = E ?

Nov312 09:48 PM
chiro

1 
368 
For any integer valued RV X Summation n=0 to infinity of s^n P(X=<n) = (1s)^1 * Summation k=0 to infinity of...

Nov312 06:04 PM
mfb

1 
565 
i was trying to formalize the definition of the supremum in the real Nos (supremum is the least upper bound that a non...

Nov312 04:28 PM
stauros

8 
1,224 
I've just started studying college math.
I read the proof by contradiction is based on the law of excluded middle....

Nov312 04:10 PM
Bacle2

1 
631 
Let X be a uniform integrable function, and g be a continuous function. Is is true that g(X) is UI?
I don't think...

Nov312 11:52 AM
Protege_de_GS

1 
753 
Hi forum, i'm new here, and have a burning question, that I can't seem to figure out or find on the internet.
...

Nov212 09:31 PM
veritas_1

2 
547 
I've taken the day off to wait for a parcel at home and (because I'm a physics student and therefore have no ability...

Nov212 04:04 PM
Ashiataka

4 
683 
Hi,
I have 3 correlated variables that I wish to model with a copula function. 2 of the variables are continuous...

Nov212 08:48 AM
bpet

1 
477 
How bad is my statistics knowledge based on the following mind map? Any concepts which aren't bold are the concepts...

Nov112 09:55 PM
chiro

4 
805 
What is the reason for calling Baye's theorem as "inverse probability"?
Any valid reason?
Thanks a lot

Nov112 11:52 AM
iVenky

7 
974 
I need some good online resources for learning statistics. Can I opt for video tutors, suggestions please...

Nov112 10:25 AM
Greg Bernhardt

1 
624 
To get the following proof I followed another similar example, but I'm not sure if it's correct. Does this proof...

Nov112 01:58 AM
Bacle2

2 
683 
Let's say that a treatment A has been proven to have an impact on the levels of B with a given confidence interval....

Oct3112 10:21 PM
chiro

1 
738 
Hi all,
in text the formula for scaled random walk is:
W^(n) (t) = (1/√n) M_nt
in the example it says that:
...

Oct3112 06:23 PM
woundedtiger4

7 
1,212 
Does anyone here know any good Bayesian statistics, Bayesian hypothesis testing, Bayesian inference, etc. learning...

Oct3112 11:25 AM
Cinitiator

11 
1,003 
Hello all,
I'm practicing proofs and I'm stuck. Here it is:
Prove that there are infinitely many solutions in...

Oct3112 07:17 AM
Klungo

30 
1,741 
I have a research problem that requires me to find the 95th percentile of a sampling distribution like this:
...

Oct3012 11:05 PM
twofishquant

7 
778 
Hello all I've been practicing proofs and would like to know if I'm on the right track. Here it is:
If the sum of...

Oct3012 07:50 PM
nicnicman

6 
639 
For a normal distribution with E=0 and Var(X)=1, how do we determine the Zvalue of a particular percentage ?
i.e....

Oct3012 09:28 AM
ashimgiyanani

3 
896 