when n = 1 the variance of a single observation is obviously zero regardless of the true variance). This gives a bias which should be corrected for when n is small by multiplying by n / (n − 1). If the mean is determined
variance is always positive because it is the expected value of a squared number; the variance of a constant variable (i.e., a variable that always takes on the same value) is zero; in this case, we have that , and ; the larger the distance is on average, the higher the variance. ...
1. Our main contribution of the thesis is in Chapter three, and a new kind of method to estimate the observational error variance, usually assumed a constant whose value can be evaluated, was brought up for Univariate Bayesian Normal Dynamic Linear Model, the most important and common one in...
1. Many of his statements were at variance with the facts. 他的说法有很多和事实不符。 来自柯林斯例句 2. This idealistic concept is at variance with reality. 这种理想主义的观念和现实相矛盾。 来自柯林斯例句 3. The good in him was a constant variance with the bad. 他善良的一面经常和...
1 . Many of his statements were atvariancewith the facts. 他的说法有很多和事实不符。 来自柯林斯例句 2 . This idealistic concept is atvariancewith reality. 这种理想主义的观念和现实相矛盾。 来自柯林斯例句 3 . The good in him was a constantvariancewith the bad. ...
Var(X + C) = Var(X), where X is a random variable and C is a constant. Var(aX + b) = a2, here a and b are constants. Var(CX) = C2 Var(X), C is a constant. Var(X1 + X2 +……+ Xn) = Var(X1) + Var(X2) +……..+Var(Xn) where X1, X2,……, Xn are indep...
5.the second moment around the mean 6.discord that splits a group 7.an event that departs from expectations ④双语例句 1.In statistical language,this estimate is called the between-column variance.在统计学中这个估计值叫组间方差。2.A New Method of3D Medical Images Segmentation Based ...
CVConstant Velocity CVCove(street abbreviation) CVControl Valve CVCheck Valve CVCape Verde(Country) CVCommercial Vehicle CVCoefficient of Variation CVCross Validation CVCoventry(postcode, United Kingdom) CVConstant Voltage CVCider Vinegar CVContingent Valuation(method for measuring compensatory restoration of...
be acontinuous random variable. Let itssupportbe the set of positive real numbers: Let . We say that has aChi-square distributionwith degrees of freedom if and only if itsprobability density functionis where is a constant: and is theGamma function. ...
If θ is equal to the population variance σ2=∫(x−E(x))2d¯F(x) and θˆ is the sample variance ∑i(xi−x¯)2/n, then θˆ has a bias of −σ2/n. In this case, biasˆjack=−1n(n−1)∑i(xi−x¯)2, which is the unbiased estimate of the population...