# Maths Uni ChatWatch

8 years ago
#3981
(Original post by assmaster)
The reasoning is:
"The average head has 100,000 hairs on it. But more than 200,000 people live in Newcastle.
So, by the Pigeonhole Principle, this is true."
I said it was random..
Are you expected to know of these bizzarre off sylabuss facts before the question?
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#3982
(Original post by assmaster)
The reasoning is:
"The average head has 100,000 hairs on it. But more than 200,000 people live in Newcastle.
So, by the Pigeonhole Principle, this is true."
I said it was random..
Thats duff reasoning.

In a way its probably true as there would probably be atleast two people with no hair i.e. bald in Newcastle.
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8 years ago
#3983
(Original post by assmaster)
The reasoning is:
"The average head has 100,000 hairs on it. But more than 200,000 people live in Newcastle.
So, by the Pigeonhole Principle, this is true."
I said it was random..
The mean doesn't really say much on its own, however if we take it to be normally distributed, then considering the variance and mean should give the result, I guess.

You cannot say the same thing for continuous measurements, though.
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8 years ago
#3984
(Original post by Slumpy)
glee
At the risk of sinking even lower in DeanK22's opinion, yay Glee! New episode tomorrow! My friend is always two episodes ahead of me though, 'cause she's too keen and downloads from America. Don't you think it's weird that the actor who plays Finn is 28 years old? I think Sue Sylvester is easily the best thing about that program

Edit: regarding the Pigeonhole Principle, that's been copied straight from lecture notes. It's to do with counting and allocation, it never mentions mean or variance.
Edit2: Oh I see where the lecturer got this from: http://en.wikipedia.org/wiki/Pigeonh...#Hair_counting
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8 years ago
#3985
These followill bro's pack some serious heel:

first few seconds.
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8 years ago
#3986
(Original post by assmaster)
At the risk of sinking even lower in DeanK22's opinion, yay Glee! New episode tomorrow! My friend is always two episodes ahead of me though, 'cause she's too keen and downloads from America. Don't you think it's weird that the actor who plays Finn is 28 years old? I think Sue Sylvester is easily the best thing about that program
Woop woop! I was contemplating watching it earlier, until I remembered it was Thursday...
Yeah, I have a friend who has a tv(at a different uni though, so I can't steal) who's always like, 4 days ahead.
Holy moly, I had no idea. I assumed he was early 20s at the oldest:O
Yeah, she probably is!
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8 years ago
#3987
(Original post by DeanK22)
Are you expected to know of these bizzarre off sylabuss facts before the question?
It would spice up the paper somewhat. But sadly no, these facts are given to you. They don't even expect you to know poker hands (after someone last year complained that the Maths department was encouraging gambling )
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8 years ago
#3988
OMG. She is totally got the bestest skin eva 4 a thirty yr old. My buddy in America (she is such a slut) hooked up with one of the extra's so he could get the editor's episodes and she has watched EVERY episode. Ohh so jealous but she is such a skank.
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8 years ago
#3989
(Original post by assmaster)
They don't even expect you to know poker hands (after someone last year complained that the Maths department was encouraging gambling )
You didn't chose your degree on the basis of gambling?
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8 years ago
#3990
(Original post by assmaster)
Edit: regarding the Pigeonhole Principle, that's been copied straight from lecture notes. It's to do with counting and allocation, it never mentions mean or variance.
Edit2: Oh I see where the lecturer got this from: http://en.wikipedia.org/wiki/Pigeonh...#Hair_counting
That is some truly terrible reasoning, and hence why I suggested more than the mean was required to make such a statement. It is by no means reasonable to assume anything about the range of a variable from its mean, so whilst it may be true that nobody in London has more than 1000,000 hairs on their head, it is certainly not reasonable to assume that simply from the mean.

Ridiculous.

EDIT: Why don't you all watch some truly excellent television: Breaking Bad or Dexter.... Glee makes baby Moses sad.
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8 years ago
#3991
(Original post by Slumpy)
Holy moly, I had no idea. I assumed he was early 20s at the oldest:O
Kinda weird to fancy him now, I can't do it.
I know loads of random Glee facts (this friend is OBSESSED) like, did you know that the actor who plays Jesse St James (Rachel's new boyfriend from Vocal Adrenaline) used to co-star with the actress who plays Rachel in Spring Awakening? And-- oh wait.
(Original post by DeanK22)
OMG. She is totally got the bestest skin eva 4 a thirty yr old. My buddy in America (she is such a slut) hooked up with one of the extra's so he could get the editor's episodes and she has watched EVERY episode. Ohh so jealous but she is such a skank.
I think you're taking the piss -.-
(Original post by DeanK22)
You didn't chose your degree on the basis of gambling?
Analysis is so helpful on roulette tables.
But srsly no, I suck at (strip) poker. I always lose. I chose my degree because I actually thought I was good at this subject, ahahahahahaha. MISGUIDED.
(Original post by v-zero)
Ridiculous.
TRY TAKING AN EXAM IN IT
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8 years ago
#3992
(Original post by v-zero)
The mean doesn't really say much on its own, however if we take it to be normally distributed, then considering the variance and mean should give the result, I guess.

You cannot say the same thing for continuous measurements, though.
Works fine if you take "the average head has 100,000 hairs" to mean "the median number of hairs is 100,000"- this means half of the population of Newcastle (i.e. at least 100,000) have less than 100,000, so just use pigeonhole. No variance required.

In fact I think it's true even if all you're given is mean=100,000, but I can't be bothered to prove it.
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8 years ago
#3993
(Original post by assmaster)
Kinda weird to fancy him now, I can't do it.
I know loads of random Glee facts (this friend is OBSESSED) like, did you know that the actor who plays Jesse St James (Rachel's new boyfriend from Vocal Adrenaline) used to co-star with the actress who plays Rachel in Spring Awakening? And-- oh wait.

But srsly no, I suck at (strip) poker. I always lose. I chose my degree because I actually thought I was good at this subject, ahahahahahaha. MISGUIDED.
Yeah, that is a bit odd.
I've no idea what Spring awakening is, but cool

I'm fantastic at strip 21. Claim different numbers to what you've got, people don't check
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8 years ago
#3994
(Original post by majikthise)
Works fine if you take "the average head has 100,000 hairs" to mean the median number of hairs is 100,000. No variance required.

In fact I think it's true even if all you're given is mean=100,000, but I can't be bothered to prove it.
I believe it's demonstrably untrue in both cases to be honest.
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8 years ago
#3995
(Original post by v-zero)
I believe it's demonstrably untrue in both cases to be honest.
I disagree. Give a counterexample.
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8 years ago
#3996
(Original post by majikthise)
I disagree. Give a counterexample.
Fine, for the median it is true, I was having a slow moment.
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8 years ago
#3997
(Original post by majikthise)
I disagree. Give a counterexample.
Mean:
1 person with 0 hairs, 1, up to 99,999, then 1 with 100,001-200,000.
Mean is 100,000, no two people have the same number, and there are 200,000 people.
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8 years ago
#3998
(Original post by assmaster)
I think you're taking the piss -.-
Clarification; it's a beautiful thing.

(Original post by assmaster)
But srsly no, I suck at (strip) poker. I always lose.
Don't get me wrong, I'm overcome by joy. But trust me, moderation is the key. And wearing lots of clothes.

(Original post by assmaster)
I chose my degree because I actually thought I was good at this subject, ahahahahahaha.
Are you sure? I find that there are some things that can help. Their even ebtter than drugs but they take up alot of time.

(Original post by assmaster)
Analysis is so helpful on roulette tables.
I'm sorry to hear that you don't do sarcasm - too shy, your delivery was all off.
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8 years ago
#3999
(Original post by majikthise)
Works fine if you take "the average head has 100,000 hairs" to mean "the median number of hairs is 100,000"- this means half of the population of Newcastle (i.e. at least 100,000) have less than 100,000, so just use pigeonhole. No variance required.

In fact I think it's true even if all you're given is mean=100,000, but I can't be bothered to prove it.
Yeah, you're right, the threshold is 200,000.
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8 years ago
#4000
(Original post by Slumpy)
Mean:
1 person with 0 hairs, 1, up to 99,999, then 1 with 100,001-200,000.
Mean is 100,000, no two people have the same number, and there are 200,000 people.
I meant for more than 200,000 people- clearly what you've posted is some kind of threshold result.
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