rain1

general recent conversations

$Mathematics$ Mathematics

Associated with Math.SE; for both general discussion & math qu...

rain1

Aug 23, 2021 19:39

I thought we wanted to eliminate trig functions when doing integrals

rain1

Aug 23, 2021 19:37

i don't

rain1

Aug 23, 2021 19:36

1/sqrt(1/4 - (t - 1/2)^2)

rain1

Aug 23, 2021 19:35

t sure what to do next?

rain1

Aug 23, 2021 19:35

@TedShifrin, I tried that but I wasn'

rain1

Aug 23, 2021 19:09

How to evaluate this integral? $\int_0^1 \frac{1}{\sqrt{t(1-t)}} dt$

rain1

Aug 11, 2021 08:18

Do you think it can be reopened now?

rain1

Aug 11, 2021 08:18

added it

rain1

Aug 11, 2021 08:16

does it need more editing to explain that in more detail?

rain1

Aug 11, 2021 08:15

it just means probability is greater than or equal to some parameter

rain1

Aug 11, 2021 08:14

so that's just a parameter could be 80% could be 90%

rain1

Aug 11, 2021 08:12

I edited it to say "to get a certain level of confidence"

rain1

Aug 11, 2021 08:04

thanks

rain1

Aug 11, 2021 07:36

i have edited the question, can it be re-opened now?

rain1

Aug 11, 2021 07:36

Q: How many flips to tell if a coin is biased?

Suppose that I have a coin which may be biased and may be fair. We can assume that each time it is flipped there is probability $p$ of it landing heads and $1-p$ of it landing tails. I do not know the probability $p$. I want to determine if it is biased or fair. How many flips do I need to perfor...

rain1

Aug 11, 2021 06:59

oh sorry i misunderstood the question

rain1

Aug 11, 2021 06:56

Koro: Yes since it's a closed interval, extreme value theorem

rain1

Aug 11, 2021 06:55

Any suggestions on how I might edit the question to get it re-opened?

rain1

Aug 11, 2021 06:41

i dont understand this closure at all

rain1

Aug 11, 2021 06:41

Q: How many flips to tell if a coin is biased?

I have a biased coin, how many flips do I need for you to be confident that it is biased? I think you could assume its fair and do a hypothesis?

probability probability-theory hypothesis-testing

rain1

Jul 31, 2021 10:25

that's very strange

rain1

Jul 31, 2021 10:25

There is no war, i did not do anything after he reverted my edit

rain1

Jul 31, 2021 10:21

nobody says that the crime is being belittled?

rain1

Jul 31, 2021 10:18

now he has accused me of vandalism for changing the question from being about 'rape' to being about a generic random variable

rain1

Jul 31, 2021 10:17

thanks for contributing

rain1

Jul 31, 2021 10:17

I appreciated your comment shintuku!

rain1

Jul 31, 2021 10:17

> @shintuku Boohoo. – Rodrigo de Azevedo 1 min ago

rain1

Jul 31, 2021 10:01

here robjohn

rain1

Jul 31, 2021 10:01

math.stackexchange.com/posts/4213488/revisions

rain1

Jul 31, 2021 10:01

can we undo his rollback and lock it maybe?

rain1

Jul 31, 2021 10:01

@robjohn do you think my edit was good? removed references to rape

rain1

Jul 31, 2021 10:01

he just deleted that comment

rain1

Jul 31, 2021 10:00

it seems like this person has some kind of "issue" and wants to take control of the question

rain1

Jul 31, 2021 09:59

the instant rollback and then acting like that is really rude

$Mathematics$ CURED

For feedback/discussion/requests of Close/Undelete/Reopen/Edit...

rain1

Aug 11, 2021 10:51

that totally makes sense, but I think these are unique reasonable interpretations of the concepts of confidence and fair coin

rain1

Aug 11, 2021 10:48

@TeresaLisbon well I kind of agree, I thought the question was fine and didn't need edited - but it was closed so I tried to edit it to pass some criteria to get it reopened. The confidence and bias seemed to be the two things people had issue with so I put clarification for both of those in.

rain1

Aug 11, 2021 10:47

why would any of these things need to be fixed? We can simply have them be variables

rain1

Aug 11, 2021 10:44

we normally talk without giving concepts like "fair coin" a second thought, it's ok for the question to ask about that. and an answer to explain that fair needs to be quantified with a parameter like epsilon-fairness

rain1

Aug 11, 2021 10:42

the thing is that the mathematics in the answer is what motivates clarifying these terms in the question

rain1

Aug 11, 2021 10:40

so I tried that

rain1

Aug 11, 2021 10:40

I think that the details in answer are sufficient but people seemed to think the question itself needed edited

rain1

Aug 11, 2021 10:40

I think the question is fine but it was closed

rain1

Aug 11, 2021 10:39

It's not an unclear question

rain1

Aug 11, 2021 10:07

which I did in my answer

rain1

Aug 11, 2021 10:07

IMO it is ok if the question does not have precise specifications for terms like confident and biased, the mathematics can point out that these terms need to be elaborated on and give reasonable interpretations

rain1

Aug 11, 2021 10:06

you can roll it back but please open the question up again, my goal is to have the question not closed

rain1

Aug 11, 2021 10:05

@TeresaLisbon yes i added a bunch of stuff to the question itself that I believed was better in an answer

rain1

Aug 11, 2021 08:05

i have edited the question, can it be re-opened now?

rain1

Aug 11, 2021 08:05

Q: How many flips to tell if a coin is biased?