The term means "differing variance" and comes from the Greek "hetero" ('different') and "skedasis" ('dispersion').
Heteroskedasticity is when the standard deviation of a variable is inconsistent when measured several times over a period of time.
One way to test for heteroskedasticity in a statistical analysis is to use the Breusch-Pagan test or the White test. These tests examine the relationship between the error terms and the independent variables in a regression model to determine if the variance of the errors is constant. If the test results show that the variance is not constant, it indicates the presence of heteroskedasticity.
K G P. Matthews has written: 'A note on bank deregulation, heteroskedasticity and the demand for money in the UK'
Trends, covariance, and correlation are the big ones. Statistical significance, unit roots, heteroskedasticity, and format and source of the data would affect quality too.
you mean what you mean
It mean what you don't what does it mean.
Mean is the average.
What does GRI mean? What does GRI mean?
The correct usage is "what DOES it mean"
The haudensaunee mean irguios
he was a mean person who lived with mean people in a mean castle on a mean hill in a mean country in a mean continent in a mean world in a mean solar system in a mean galaxy in a mean universe in a mean dimension
as you do