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

Feb2313 09:25 AM
micromass

1 
27,578 
Hello,
I am trying to construct a general function/method based on two sets of minimum/maximum data point...

Feb1314 06:08 PM
Stephen Tashi

1 
228 
Hey!
I've been doing some research on random walks. From what I have gathered, a random walker in 1D will have:...

Feb1314 04:19 PM
mathman

3 
224 
Suppose we have 2n binary choices. Then the probability of having the same number of results is :
C(2n,n)/2^(2n) ?...

Feb1314 02:36 PM
jk22

2 
197 
There are various zeroone laws (e.g. Kolmogorov's) that assure us that certain measurable events have probability...

Feb1314 11:51 AM
eigenperson

1 
201 
Hi,
English is not my native language.
I manage first time a competition on social media, where:
1. people bring...

Feb1214 11:42 PM
Simon Bridge

7 
235 
In one case I get the results as a significant difference in the other with the same dana, the difference is not...

Feb1214 06:56 AM
FactChecker

4 
232 
This is from Peter Smith's Gödel without tears.
I don't agree with this.
If it appears in the list of p.r....

Feb1114 05:55 PM
jgens

1 
217 
Lemma: If A is an at most countable alphabet, then the set A^* of strings over A is countable.
Proof begin:
Let...

Feb1114 02:45 PM
Hornbein

4 
253 
Hi everyone, hopefully someone can help
For an vector AR(1) model of the form
y(t)=Ay(t1) + et
How does one...

Feb914 05:20 PM
FactChecker

5 
294 
Hello, PF!
* * *
In a discussion of the standard deviation of a sample in relation to the 689599.7 rule,...

Feb714 12:22 PM
Hornbein

4 
350 
Hi all,
I am reading Suppes' book on axiomatic set theory and having difficulties understanding the part on formal...

Feb514 11:21 PM
EvanOktavianus

0 
213 
I notice that the examples always seem to talk about linear regressions, as in y=mx +c
So how I understand this is...

Feb514 10:32 PM
FactChecker

6 
246 
25 questions, multiple choice, 5 choices per question.
Correct = 6 points
blank = 1.5 points
wrong = 0 points.
I...

Feb514 12:37 PM
mfb

5 
261 
I am told that an exponential distribution is memoryless. But why aren't other distributions, such as the normal...

Feb514 12:23 PM
oneamp

3 
218 
What are the current capabilities of modern Theorem Provers? I know about logic/undecidability/complexity theory so go...

Feb514 11:39 AM
Hornbein

4 
272 
Hello,
in a certain context I had to deal with a random variable Y=e^X, where X follows a standard normal...

Feb514 10:49 AM
economicsnerd

1 
203 
Hello,
I was trying to interpret the formula of Pearson's Chisquared test:
\chi^2 = \sum_{i=1}^{n} \frac{(O_i ...

Feb414 10:13 AM
mnb96

4 
319 
what is gaussian function?how this is related to gaussian distribution?

Feb314 11:42 AM
Drakkith

1 
229 
Hi quick question. I was recently posed a question by a coworker who saw it in a liquor store contest:
156...

Feb214 11:44 PM
Simon Bridge

12 
454 
I am no expert in formal logic, so please forgive me if this question sounds stupid. It's about a common pattern used...

Feb214 10:58 AM
tom.stoer

15 
448 
Why is it so hard to convert natural language to propositional logic. We are so comfortable in understanding and...

Feb114 11:56 PM
Stephen Tashi

2 
224 
“there is a disproof of me that occurs before any proof of me.”
"If this sentence is provable, there is a shorter...

Feb114 08:04 PM
cragar

0 
182 
Hello,
i was wondering if the additon formula for PDFs holds also for CDFs.
Particularly, when an X event or a Y...

Feb114 06:27 PM
Stephen Tashi

11 
295 
Hi guys.
Could anybody tell me how the Johnson distribution was derived? I have searched the internet but I couldn't...

Feb114 10:51 AM
Stephen Tashi

1 
202 
what is gaussian function?what are it's field of applicaton?how this function is derived,i mean what are the logical...

Feb114 10:49 AM
Stephen Tashi

1 
194 
This is not a homework problem. Just a curiosity. But my statistics is way rusty.
Suppose a binomial probability...

Feb114 08:12 AM
PeroK

1 
165 
$$1.\quad p\quad if\quad q\\ \equiv if\quad q\quad then\quad p\\ \equiv q\rightarrow p\\ \\$$$$2.\quad p\quad...

Jan3114 10:26 PM
FactChecker

4 
527 
Hello,
I have a question to Maximum Likelihood Estimation. The typical form of MLE looks like this:
X = Hθ + W....

Jan3114 10:13 PM
FactChecker

4 
295 
I'm writing the paper on this experiment I just did. Basically I took sets of data for two variables (x,y) and I fit...

Jan3114 09:44 PM
FactChecker

2 
239 
Hi,
I am trying to understand the degrees of freedom parameter in the Chi_squared distribution and I have found...

Jan3114 08:50 PM
FactChecker

4 
244 
Hi
Can you please help me with this problem?
"What is the maximum size of a set A of logical expressions that...

Jan3114 05:16 PM
Stephen Tashi

1 
213 
Hi,
It has been a long time since I have worked with pdfs so perhaps someone can help. According to Wikipedia...

Jan3014 07:06 AM
Usjes

2 
221 
So I was thinking what would be the chances of two players on seperate pool tables playing the exact same game of...

Jan2914 07:49 PM
bahamagreen

18 
653 
I have a mean mu, and an exponential distribution function. How do I use a random number, generated with a PRNG, to...

Jan2914 10:34 AM
oneamp

6 
256 
Hi,
I generally know the concept of degrees of freedom based on the commonly used explanation about how using the...

Jan2814 10:59 AM
Stephen Tashi

1 
454 
Hello everyone,
I have a large number of measurements with associated uncertainties, and I know that the real...

Jan2814 10:19 AM
Stephen Tashi

11 
392 
hey pf!
can someone help me understand why a pdf is defined in the following manner: \lim_{\substack{N\to \infty\\...

Jan2714 09:18 PM
joshmccraney

2 
210 
Hi,
i was wondering if the following is valid:
E = E / E, given that {x,y} are nonnegative and independent...

Jan2714 06:28 PM
economicsnerd

2 
335 
For a simple linear model:
\alpha+\beta\times x=y
If it is observed that y \in (8.51,23.20) given x=4
The...

Jan2714 03:39 PM
mathman

1 
164 
I have taken a course in probability and statistics, and did well, but still I feel that I do not grasp the core of...

Jan2614 05:33 PM
PeroK

63 
3,559 