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

You are not logged in.

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### 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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

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

ElainaVW
Member
Registered: 2013-04-29
Posts: 577

### Re: Expectation #1

hello

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

Offline

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Expectation #1

Hi;

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

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

ElainaVW
Member
Registered: 2013-04-29
Posts: 577

Offline

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### 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.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

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

ElainaVW
Member
Registered: 2013-04-29
Posts: 577

Offline

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Expectation #1

Hi;

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline