4.1.3.2.12 WeightedVarianceOfMean

Prototype:

function WeightedVarianceOfMean (TableOrLayer : TObjectWrapper; const AttributeName :string; const WeightAttribute :string; const NullAsZero :boolean, const NSample :integer; const NPopulation :integer) : extended;

Description:

Calculates weighted variance of mean a specific attribute

Syntax:

variable := WeightedVarianceOfMean (tab, AttributeName, WeightAttribute, NullAsZero, NSample, NPopulation);

Part

Description

variable

A variable declared as type of extended

tab

Table containing source variables

AttributeName

Attribute of source table containing data to enter calculations

WeightAttribute

Attribute of source table containing weights

NullAsZero

Boolean expression defining whether to exclude null (false) entries or replace nulls with zeros (true)

NSample

Number of observations in a sample

NPopulation

Number of observations in a population

Return value:

Weighted variance of mean