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by freyzi
November 27th, 2007, 10:05 pm
Forum: Off Topic
Topic: World Competitiveness Rankings
Replies: 163
Views: 174097

World Competitiveness Rankings

QuoteOriginally posted by: TraderJoeMost Competitive 2007.Looks like there is competition between competitiveness rankingsMost Competitive 2007.
by freyzi
May 19th, 2007, 11:49 am
Forum: Off Topic
Topic: World Competitiveness Rankings
Replies: 163
Views: 174097

World Competitiveness Rankings

If you're happy and competitive, clap your hands
by freyzi
September 18th, 2006, 2:15 pm
Forum: Student Forum
Topic: How to compute E(B^3),when B~N(0,1)
Replies: 7
Views: 93003

How to compute E(B^3),when B~N(0,1)

all odd moments are zero by symmetry
by freyzi
August 29th, 2006, 4:56 pm
Forum: Student Forum
Topic: Brownian Motion?
Replies: 13
Views: 95014

Brownian Motion?

its (a.s.) not continuous at zero: it jumps by Z.the increments are not stationary: B(h)-B(0) and B(t+h)-B(t) do not have the same distribution, t>0 & h>0.but it is a MG.
by freyzi
June 11th, 2006, 1:09 am
Forum: Brainteaser Forum
Topic: Here's a beauty
Replies: 2
Views: 102902

Here's a beauty

Prove or disprove the existence of rv's X, Y and Z such that:
by freyzi
June 10th, 2006, 11:33 pm
Forum: Brainteaser Forum
Topic: A nice brain teaser for this weekend
Replies: 9
Views: 104185

A nice brain teaser for this weekend

For any n number of seats if you place the first one in seat 3 you force someone into seat 1. This solves both the "best-worst" and allows for the "best case".
by freyzi
July 18th, 2005, 5:15 pm
Forum: Off Topic
Topic: World Competitiveness Rankings
Replies: 163
Views: 174097

World Competitiveness Rankings

lets not forget about the newest Icelandic chess champ: Bobby Fischer
by freyzi
July 18th, 2005, 12:55 am
Forum: Technical Forum
Topic: Vol...
Replies: 5
Views: 142876

Vol...

<t>In stead of stocks lets assume this is EUR/USD and EUR/SEK. According to the BBA vols on May 31 where 9.03 and 3.34 respectively for the one month ATMF. There is "no" arbitrage between EUR/USD, USD/SEK and EUR/SEK. For our purpose, lets ignore interest-rates and assume they are constant and equal...
by freyzi
July 16th, 2005, 3:22 pm
Forum: Off Topic
Topic: World Competitiveness Rankings
Replies: 163
Views: 174097

World Competitiveness Rankings

<t>"I have never heard of any Icelander..."Reminds me of a question Einstein once asked: Is the moon still there when no one is looking at it?"Nominate"? This isn't the Oscars.Iceland has one per 300.000 inhabitants, Chile and Japan have one per 8.000.000. France would need 200 Nobel prices while th...
by freyzi
July 16th, 2005, 12:27 am
Forum: Student Forum
Topic: Poisson Approximation: When n is large?
Replies: 7
Views: 159630

Poisson Approximation: When n is large?

Let be the sum of n independent Bernoulli random variables with thenwith . So, preciseness is decreasing in n.For proof, see LeCam's Inequality and Poisson Approximation, by Mike Steele.
by freyzi
July 15th, 2005, 11:47 pm
Forum: Off Topic
Topic: World Competitiveness Rankings
Replies: 163
Views: 174097

World Competitiveness Rankings

<t>Don't underestimate something smaller then you, it can be allot quicker Regarding education, Iceland is much to small to have an university like the ones mentioned here. But if you take a closer look I would guess Iceland would be one of the biggest nationalities studying at top tier schools, tha...
by freyzi
March 8th, 2005, 12:56 am
Forum: Student Forum
Topic: Poisson Approximation: When n is large?
Replies: 7
Views: 159630

Poisson Approximation: When n is large?

<t>Yes, I agree with you that a fixed Poisson () distribution is the limit of a sequence of binomial distributions with parameters n and /n as n tends to infinity.But, what I am fishing for is:A fixed binomial distribution with parameters n and p can be approximated by a Poisson distribution with pa...
by freyzi
March 7th, 2005, 10:09 pm
Forum: Brainteaser Forum
Topic: help with poisson process
Replies: 11
Views: 160358

help with poisson process

For an arbitrary t in a Poisson process there are independent exponential distances to the next points on both sides. The minimum of two independent exponential is exponential 2 and the expected value is 1/(2).
by freyzi
February 22nd, 2005, 3:09 pm
Forum: Student Forum
Topic: Poisson Approximation: When n is large?
Replies: 7
Views: 159630

Poisson Approximation: When n is large?

<t>Fasturtle, you are assuming that when n increases then p decrease. But that doesn't have to be the case. See for example the thread Probability of 8 Occurences?. There the Poisson Approximation is closer for n=1.000.000 then 200.000.000.The Poisson Approximation is pretty good for small fixed p a...
by freyzi
February 22nd, 2005, 12:12 am
Forum: Student Forum
Topic: Poisson Approximation: When n is large?
Replies: 7
Views: 159630

Poisson Approximation: When n is large?

Why do many “Introduction to Probability”-books say:…when n is large and p is small … is approximately Poisson np,Why should n be large?
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