Topic: Equal Variance
Not finding your answer? Try searching the web for Equal Variance
Answers to Common Questions
What is the fixed manufacturing overhead budget variance equal to...
Fixed manufacturing overhead budget variance is? Read More »
Source: http://wiki.answers.com/Q/What_is_the_fixed_manufacturing_overhea...
What does equal variance mean?
Variance is the square of the standard deviation. Equal variance refers to data with the same square of standard deviation. Read More »
Source: http://www.chacha.com/question/what-does-equal-variance-mean
What is Equal variance ?
In probability theory and statistics, the variance is a measure of how far a set of numbers are spread out from each other. It is one of several descriptors of a probability distribution, describing how far the numbers lie from the mean (ex... Read More »
Source: http://answers.yahoo.com/question/index?qid=20110928085144AAP51vm
Featured Content:
Equal Variance
More Common Questions
Answers to Other Common Questions
When alpha is 2 or less than 2 the variance of the inverse gamma doesn't exist. That is why when the variance is defined for the inverse gamma it always says "for α > 2". It is also the case that when alpha is 1 or less the mean of the inve...
Read More »
Source: http://wiki.answers.com/Q/What_is_the_variance_of_a_inverse_gamma...
You can't use a t-test to determine whether variances are equal as variances do not follow the t-distribution. Instead, the random variable (n-1)s²/σ² follows the χ² distribution with n-1 degrees of freedom. In turn, the ratio of two chi sq...
Read More »
Source: http://answers.yahoo.com/question/index?qid=20090210123906AA6iPvr
This is a little difficult to explain but ill give it a shot. Squaring the individual variences causes all the values obtained to be positive. We can then add them all up to obtain our total varience. If we took the square root of all the s...
Read More »
Source: http://answers.yahoo.com/question/index?qid=20070814120249AAO0DUk
Let y = E(x - b)^2 = E(x^2 - 2bx + b^2) = E(x^2) - 2b*E(x) + b^2 dy/db = -2*E(x) + 2b For minimum y, dy/db = 0 ----> -2*E(x) + 2b = 0 ----> b = E(x)
Read More »
Source: http://answers.yahoo.com/question/index?qid=20091012132902AAImjgK
you should go to a science website...look it up on goodle maybe to find a good one. they would be able to answer...and maybe if the website has an email you could ask them.
Read More »
Source: http://answers.yahoo.com/question/index?qid=20080612101555AAMY52B
In actual real-world practice I never use a t-test with equal variance - the assumption of equal variance is just too strong. Some people will first perform an F-test on the variances and then select a t-test based on the results but this i...
Read More »
Source: http://answers.yahoo.com/question/index?qid=20071019204909AABfP9K
