因此其条件方差为：\begin{equation}\begin{split} \mathrm{Var}(\hat\beta_k|X)&=(\hat V'\hat...
The square root of the variance inflation factor tells you how much larger the standard error is, compared with what it would be if that variable were uncorrelated with the other independent variables in the equation. Example If the variance inflation factor of an independent variable were 5.27 ...
1.12.3.3 Variance Inflation Factors From Equation (14), we know that the elements in the main diagonal of the dispersion matrix do not depend on the experimental response; consequently, it is possible to use them to compare the two designs ξN and ξ′N. However, they depend on the length...
The square root of the variance inflation factor tells you how much larger the standard error is, compared with what it would be if that variablewere uncorrelatedwith the other independent variables in the equation. Example If the variance inflation factor of an independent variable were 5.27 (√...
byMarco Taboga, PhD A variance formula is an equation used to compute or define the variance. There are several formulae that can be used, depending on the situation. General formula We start with a general formula, used to define the variance of a random variable ...
For each data set, the model ŷ = b0 + b1x1 + b2x2 (Equation (8)) was calculated. The values of x1 and x2, E(y∣xi), ɛi, and yi are listed in Table 2. The estimated coefficients, the coefficient of multiple determination, and the variance inflation factors (VIFs) (...
Non-constanterrorvariance Non-constant error variance Here's an example of non-constant error variance.Here is a plot of the X versus the residuals. It is from a regression of life expectancy (e0_95) on logged income, and the Studentized residuals are plotted as a function of logged income...
Suppose the equation of the regression line is Y = a + bX. Which of the following denotes the amount of variability of Y explained by X? a. Y b. b c. R d. R-squared e. X In working with two variables related by a regression equation, th...
For the vegetative phase, the logistic equation can be used to estimate the population of cells [7]: lnxv=b11+b2exp(−b3t)where xv is the vegetative cell density, t is time, and b1 to b3 are the constants of the equation. The experimental data of vegetative cell density vs. time ...
4) Variance inflation coefficient 方差膨胀系数5) difference equation with variable coefficients 变系数差分方程 例句>> 6) amplificatory factor of variance 方差放大系数 1. The second approach presents detailed importance sampling density function through amplificatory factor of variance and character ...