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

Feb2313 09:25 AM
micromass

1 
27,635 
I've been reviewing probability and came across this problem:
A penny may be fair or it may have two heads. It's...

Dec1505 05:40 PM
Hurkyl

14 
1,823 
A friend gave me this problem; it's been years since I've taken probability, and I'm really rusty. I'm curious how to...

Nov2106 12:15 PM
EnumaElish

3 
3,979 
I don't think I *really* understand the Central Limit Theorem.
Suppose we have a set of n independent random...

Jan2207 05:41 PM
HallsofIvy

3 
2,189 
I'm trying to compare fits to data in a certain way. I start with the initial data and fit and compute the \chi^2...

Oct1711 09:12 AM
cahill8

0 
891 
I'm dealing with a histogram and want to use poisson errors for each bin. For example, having 7 items in a bin gives...

Aug111 10:24 AM
pmsrw3

1 
1,298 
...I understand why it becomes more and more insignificant as the value of n increases, but what is the purpose of...

Feb1012 10:37 AM
Stephen Tashi

5 
7,318 
Hi! I am trying to figure out all possible combonations for 6 items among a group of 18 choices. So I turn to my old...

Nov1511 05:15 AM
chiro

2 
1,059 
What were the chances that Paul the octopus predicts winners in 7 matches in a row? Assuming that teams are of equal...

Jul1210 06:11 PM
SW VandeCarr

5 
1,861 
guys im bit confused with the statement borel cantelli lemma 2 :
"If the events En are independent and the sum of the...

Jun2312 01:21 PM
calios

2 
734 
If I were to use a twotone image e.g. fax, and were to transmit it linebyline, where the the individual pixels...

Dec1807 08:38 PM
EnumaElish

1 
1,730 
I am aware that, in statistics, things get difficult as soon as they get nonlinear. And taking the reciprocal of a...

Jul312 02:28 AM
DrDu

38 
3,373 
I know how to calculate the probability of getting a 1 and then 2 or 1 and 1 and etc, that's just 1/6 * 1/6
Now...

Apr1812 04:06 PM
calvinjhfeng

2 
1,143 
Ive never been taught functions using sets and I have been told that to really understand the real meaning of them it...

Jan2209 02:14 PM
cam875

5 
3,545 
i was confused about what the cardinality of the set {1,2,2,3,3,1,1,1} is?
is it 8 or is it 3?

May310 08:25 AM
g_edgar

2 
737 
okay so i have looked up things online and they when other ppl explain it it still doesnt make sense. im working on a...

May1310 05:34 PM
Fredrik

7 
2,438 
Hi guys, I'm new in this forum, so i hope you can help me with these problems. It might be easy, but i just started...

Oct2504 10:59 AM
NateTG

1 
1,308 
Hey!
Just as the title suggests I am looking for a good book on stochastic processes which isn't just praised...

Aug712 03:58 PM
dvchench

3 
4,165 
Hi,
Can someone plz solve this sum either by drawing a rook diagram or any other way
the question goes like:...

May505 12:55 PM
campa

6 
1,050 
If there is a box which has 7 red balls, 4 white balls and 9 black ball and you take 3 balls out what is the...

May505 09:53 PM
campa

3 
1,312 
Ok well here goes.
what is teh chance of flipping a coin 10 times and getting either 10 heads or 10 tails. Once this...

Jan1905 01:19 AM
Chronos

6 
5,205 
Can all logic be stated in mathematical equation? If so, I'm not sure how you would state cause and effect.

Apr2707 04:36 PM
Hurkyl

1 
1,158 
My apologies if the following is a stupid question. But is the empty set disjoint with itself? Certain aspects of...

Sep1609 04:51 PM
g_edgar

2 
2,892 
Suppose X and Y are continuous random variables with the joint pdf f_{xy}(x,y) on the \times square.
Is the...

Oct2310 04:57 PM
mathman

5 
1,166 
Hi everyone, here's a probability problem that seems really counterintuitive to me:
Find four random variables...

Dec1310 04:19 PM
mathman

2 
2,491 
Hi everyone,
I came across a problem that requires knowing this fact.
But can any open set in R^n be expressed...

Jun411 04:48 PM
CantorSet

5 
4,157 
Hi everyone,
I'm confused about Durrett's formal definition of a random variable, as well his formal notions of...

Jun611 04:13 PM
disregardthat

1 
1,035 
Hi everyone,
I have a feeling the following property is true but I can't find it stated in any textbook/online...

Aug1111 12:14 PM
CantorSet

5 
2,149 
Hi everyone,
Someone posed the question:
and Marilyn (high IQ record holder) answers:

Mar3012 10:43 PM
chiro

144 
20,732 
Hi everyone,
This is not a homework question. I just want to understand an aspect of linear regression better. ...

Aug2711 11:50 PM
Stephen Tashi

3 
2,300 
Hi everyone,
This is not a homework question but something I thought of while reading.
In the method of...

Aug3111 07:15 PM
CantorSet

3 
1,398 
Hey all i struggling to understand, these concepts. would some explain to me the relationship and differences the...

Feb1910 04:18 PM
mathman

1 
2,696 
Why does a distribution function F_X have to be right continous ?
is'nt just making sure it is nondecreasing enough

Mar1110 03:58 PM
mathman

1 
675 
I just beginning to study measure theory. so far from what i understand so far , can we say in general, an integral is...

Apr2610 04:10 AM
winterfors

4 
1,135 
so a charateristic function of a RV is complex valued funtion. from my lecture, the distribution funtion of a Random...

Mar2710 04:03 AM
SW VandeCarr

3 
877 
measure spaces and random variable are still fuzzy to me although i'm starting to see how random variable are s
used,...

Apr1410 11:35 AM
cappadonza

0 
636 
suppose we have random variable defined a function of another random variable such that Y = \mathbb{E}(X)
it seem...

Apr1710 04:15 PM
mathman

1 
1,627 
Hi this is more of a set theory question really, i'm a bit confused,
say \mathcal{F} is collections of sets, and...

Jun1510 09:25 AM
EnumaElish

1 
569 
this is not a homework question, it was a interview question
Question:
suppose we keep flipping an unbiased...

Jul1010 08:54 PM
SW VandeCarr

21 
3,968 
Hi
context: i am trying to understand convergence of sequence of random variables.
random variable are just...

Aug610 04:31 PM
cuak2000

2 
5,111 
Hi all
I am struggling to see the difference between Convergence in probability and Almost surely convergence of a...

Sep610 06:43 AM
Fernsanz

4 
4,342 