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

Feb2313 09:25 AM
micromass

1 
32,567 
there's this castle and in the basement only a few people go in there are thousands of spiders madly spinning webs. ...

Sep1803 03:18 AM
phoenixthoth

0 
4,753 
currently, im studying probability in my school.
i'm bit confused with the difference btw :
(a) mutually...

Sep2403 04:02 AM
hypnagogue

3 
9,299 
I once read a very good explanation for the n! factor in the combinations formula but I can't find it. Can someone...

Sep2403 11:32 PM
mmwave

2 
8,814 
Current definitions of probability are a bit "flowing on water" and numerous paradoxes result from the fact...

Sep2403 01:56 AM
kerimek

0 
3,215 
How does the cardinal number for the set of irrational numbers compare to that for a fractal set?

Sep2503 11:18 PM
mathman

1 
3,035 
I'm reading "A Course in Advanced Calculus" by Robert Borden, and one of the problems begins as follows:
"Prove...

Sep2503 04:11 PM
Hurkyl

4 
2,825 
hello
given a random hyperreal number x, can one decide if it is limited or unlimited in a finite amount of time?...

Sep2903 05:35 PM
phoenixthoth

0 
2,368 
We know that the standard deviation for a random walk, represented by a net distance d, to be approximately the...

Oct3003 09:25 PM
Hurkyl

12 
7,605 
how would you figure out what the chances are of flipping a coin 100 times and it landing 50 times of heads and 50 on...

Oct2903 02:03 AM
sol1

8 
8,731 
Concrete road pavement gains strength over time as it cures. Highway builders use regression lines to predict the...

Oct803 08:59 PM
Integral0

1 
3,103 
What is the equation for a paired ttest?

Oct903 02:09 PM
hypnagogue

1 
10,009 
mathworld defines the paradox like this:"Even though real arithmetic is uncountable, it possesses a countable...

Oct1703 05:54 PM
Hurkyl

1 
2,378 
Ok, a friend at another forum posted this challenging probability problem.
Mike throws 20 6sided die on the table....

Jan704 03:57 PM
NateTG

8 
2,637 
If a person passes through 6 sets of independent traffic lights that have a probability of 0.7 to stop the person at...

Oct2803 05:22 AM
HallsofIvy

1 
2,438 
Does physics or mathematics allow for a probability of a probability?

Nov1103 04:32 PM
fsteveb

10 
5,734 
Hello everyone, I feel ashamed to be asking someone to explain such simple notation to me, but I’m having serious...

Oct3003 09:37 AM
jcsd

3 
26,043 
P for powerset, n for intersection
show that P(AnB)=P(A) n P(B)
Studying for a midterm, seen this question in...

Nov803 07:58 AM
jcsd

6 
10,717 
Hello all, can anyone help me on this question? since it doesn’t make any sense to me. Thank you.
A darts player...

Nov2903 11:53 AM
Hurkyl

17 
3,781 
Hi all,
I think this would be a probability question.
We do a random check. 10% smokes marihuana. This test...

Nov2503 09:40 AM
HallsofIvy

2 
2,067 
Using a .05 level of sign, test the hyp that the probability of the NCAA champion being from the big east is 20%
...

Dec1603 08:32 PM
Sting

3 
3,865 
Are the following sets fields: the empty set, {0} {0,1}? (it's that I've seen {0,1} as an example of a field yet I...

Nov2503 04:35 PM
mathman

5 
4,004 
hello,
Could someone help me please.
I am studying Cantor's set theory at present, but am a little confused as to...

Nov2603 11:43 AM
NateTG

1 
2,118 
trying to define n/m when it exists in N.
suppose m and n are natural numbers and let denote all functions from n...

Nov3003 12:11 PM
phoenixthoth

6 
2,027 
Could someone please inform me as to the procedure used to test the significance of a calculated Pearson's correlation...

Dec403 07:46 AM
The Opiner

0 
3,306 
In fact pa is true for all integers n greater than a particular base value and you should complete the proof given...

Dec703 05:30 AM
KLscilevothma

1 
16,414 
Can anyone let me know the estimator for the expectaiion of X^Y. X and Y are iid random variables, and their...

Dec1103 04:58 PM
mathman

4 
4,529 
I'm at my wits end trying to show that this Exc(n), or "excess over square" function is recursive. I know that it...

Dec1503 10:38 AM
Hammerdown00

0 
1,977 
Hi all!
This is an interesting problem, on probability, for those who likes solving such things (like me ):
A...

Dec2203 09:05 AM
Njorl

6 
2,489 
Anyone know what the answer to this would be?
A implies B
C implies not B
What happens when both A and C occur?
...

Dec2103 08:35 PM
Hurkyl

3 
1,804 
It seems to me that a lot the concepts in statistics are rather arbitrary and don't seem be mathematically derived....

Jan2604 05:59 PM
turin

8 
2,581 
Greetings,
I am in desperate need of some help. I have my exam final tomorrow morning and have just come across a...

Jan1304 03:27 PM
repugno

0 
1,538 
need some help with statistics!
My problem is this: I am given a set of data for a group of individuals and from...

Jan1704 10:44 AM
selfAdjoint

1 
1,848 
What sort of distribution (eg binomial, normal..) would you expect each of the following to be? I am trying to get my...

Jan2904 11:46 AM
NateTG

1 
1,827 
The mean probability of 100 observations is .0422. If you are not given the data for a sample size of 200, how do you...

Feb904 10:47 PM
Integral0

2 
1,702 
let <x> =5 and Standard Dev =2. Which linear tranform y=ax+b results in <y>=20 and standard dev=4????

Feb1804 07:06 PM
mathman

1 
1,492 
Hi to all you smart people out there: I need your help, and don't know how to solve this. If a grandfather is born on...

Feb1804 10:49 AM
NateTG

7 
1,681 
To anybody that can offer a hand.
<x>=5, Standard Deviation = 2, median Mx=4.5, Quartile1=4, Quartile 2=6,...

Feb1904 04:10 AM
matt grime

2 
1,351 
I really need to know how to do a question like this for a course I am taking. Can you help????
Out of 2 million...

Feb2404 10:50 PM
mathman

1 
1,768 
I am having trouble with this question.
Let X equal the number of flips of a fair coin that are required to observe...

Mar204 08:50 AM
matt grime

1 
8,378 
Does anyone know if there is any study of probability theory from the point of view of category theory? I was trying...

Feb2604 07:34 PM
matt grime

1 
3,206 