Expected Value and Variance Question

whitehorsey
Messages
188
Reaction score
0
Does μx mean the same thing as E[X]? Also, does σ2x mean the same thing as Var X?
 
Physics news on Phys.org
Those would be reasonable notations for E[X], Var(X). I wouldn't say it's sufficiently standard to answer more confidently.
 
haruspex said:
Those would be reasonable notations for E[X], Var(X). I wouldn't say it's sufficiently standard to answer more confidently.

Okay Thank You!
 

Thread 'Roulette wheel physics and probability'

Hi all, I've been a roulette player for more than 10 years (although I took time off here and there) and it's only now that I'm trying to understand the physics of the game. Basically my strategy in roulette is to divide the wheel roughly into two halves (let's call them A and B). My theory is that in roulette there will invariably be variance. In other words, if A comes up 5 times in a row, B will be due to come up soon. However I have been proven wrong many times, and I have seen some...
View full post »
Thread 'Detail of Diagonalization Lemma'

Thread 'Detail of Diagonalization Lemma'

The following is more or less taken from page 6 of C. Smorynski's "Self-Reference and Modal Logic". (Springer, 1985) (I couldn't get raised brackets to indicate codification (Gödel numbering), so I use a box. The overline is assigning a name. The detail I would like clarification on is in the second step in the last line, where we have an m-overlined, and we substitute the expression for m. Are we saying that the name of a coded term is the same as the coded term? Thanks in advance.
View full post »

Similar threads

B Variance & Standard Deviation
Replies
42
Views
4K
MHB Distribution, expected value, variance, covariance and correlation
Replies
14
Views
2K
MHB Cdf, expectation, and variance of a random continuous variable
Replies
1
Views
2K
I What is the expected value of Cov(x,y)2 in an independent X and Y scenario?
Replies
17
Views
3K
A A trend formula for the variance
Replies
2
Views
1K
I What is the expected (squared) coefficient of variation of a sample?
Replies
6
Views
3K
I An Alternative Variance Formula
Replies
5
Views
2K
I Expectation value of Fourier conjugates
Replies
1
Views
2K
Expected value and variance of these sums
Replies
2
Views
1K
MHB Expected value and variance of profit
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top