Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Have you ever seen anything like that done before?

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**zetafunc.****Guest**

Can't say that I have... could be that he is correct, just using a bad, or insufficient explanation.

There used to be 3 stats questions in STEP. Barely anyone chose them and always focused on pure and sometimes mechanics, so they now have only 2 instead, and stats is still the least popular section of the paper.

Out of the 248 questions I have done, only 18 were stats...

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

What a shame. I have never worked on one like this. If you get the solution to it please post it.

I am going to eat, see you in a bit.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**zetafunc.****Guest**

Okay, see you later.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Just made a sandwich. Did not take long.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**zetafunc.****Guest**

Probably my favourite food on the go, even butter sandwiches will do...

Haven't made much progress with the problem, still trying to understand it. All I know is that it is like saying a currant can lie anywhere in the area underneath y = 2x, between 0 and 1.

I am thinking of having two continuous uniform distributions L ~ [0, 1] for the x-axis, and M ~ [0, 2L] for the y-axis, but is there some way of combining the two?

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Yes, there is a joint distribution, but does that solve the problem.

You know that symbol ~ ? In mathematica they call it a condition, what do you call it?

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

I thought it just meant 'has the distribution' in this context...

I don't think it will solve the problem. Still trying to work out how the probability that a currant is in the portion is x.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

That's it, "the distribution" that is the correct phrase.

First thing, that answer he got might not be correct.

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

Lots of posters seem to be agreeing with him though...

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Yea, the good ones there are saying he is right.

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

There was a poster called ben-smith who didn't understand the solution and the answers they gave in that thread didn't help either.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

I am looking through my library in the statistics books. Someone has to have done a problem like this somewhere.

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

Okay, let me know if you find anything.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Are you kidding? I will be jumping up and down with joy. I would post it right here.

What title or type of problem would you call this?

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

The paper hasn't given it a title. Not sure what I'd call it...

Sometimes they post very difficult questions in STEP. They say that in the 2012 paper there was a problem no one in the maths department at Cambridge could solve, so they put it in the 2012 STEP paper to see what would happen. And then 2008 STEP III featured a question only 3 people in the country managed to get right (it was a stats question also).

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

That might be why I am not coming across something like it in these texts. I need to get some rest see you later and thanks bringing the problem in.

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

Okay, see you later.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Hi;

I am back and resuming the search.

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

Okay, thanks. I asked Hanh and she has no clue either, she could not do the first part. If adriana comes online I will ask her what she thinks.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Hi;

Okay, but I doubt they will have an answer.

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

I doubt she will come online to help, either.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

You mean in here?

**In mathematics, you don't understand things. You just get used to them.**

Offline

**zetafunc.****Guest**

No, on chat or by e-mail.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 89,124

Oh, she might. Based on that question she will be needing lots of help.

**In mathematics, you don't understand things. You just get used to them.**

Offline