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

You are not logged in.

#1 2014-05-01 20:20:05

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,074

Expectation #1

C wrote:

I have 3 random variables X,Y and Z, independent and each from the standard normal distribution N(0,1) what is the

A says) √2

B says) That is not even close...

C says) Darn good answer A, I am going to use it with your permission of course.

A says) Pay no attention to B, use it all you want.

D says) A is a swell guy and my hero.

E says) A makes me nauseous. His answer is totally wrong.

What is the right answer?


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.

Online

#2 2014-05-02 00:39:00

ElainaVW
Member
Registered: 2013-04-29
Posts: 306

Re: Expectation #1

hello smile

Last edited by ElainaVW (2014-05-02 00:39:20)

Offline

#3 2014-05-02 00:43:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,074

Re: Expectation #1

Hi;


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.

Online

#4 2014-05-02 00:44:13

ElainaVW
Member
Registered: 2013-04-29
Posts: 306

Re: Expectation #1

Offline

#5 2014-05-02 00:48:50

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,074

Re: Expectation #1

Hi;

Yes, it is exactly what I have always strived for but fell short of, the perfect synthesis of hand methods and computer ones.


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.

Online

#6 2014-05-02 00:53:47

ElainaVW
Member
Registered: 2013-04-29
Posts: 306

Re: Expectation #1

Offline

#7 2014-05-02 00:58:09

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,074

Re: Expectation #1

Hi;


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.

Online

Board footer

Powered by FluxBB