IStatistics.StDevDcml

Syntax

StDevDcml(Values: Array): Decimal;

Parameters

Values. An array of decimal high-precision numbers corresponding to the sampling from universal set.

Description

The StDevDcml method estimates standard deviation by sample of the Decimal type.

Comments

Standard deviation is a degree that show how far data points are scattered from their mean. Standard deviation is calculated using unbiased or n-1 method.

To define numbers of the Decimal type in the array, it is necessary to write the "m" character after the value of each number. For example: 0.001m.

Example

To execute the example, add a link to the Stat system assembly.

Sub UserProc;
Var
    st: Statistics;
    a: Array[5] Of Variant;
    s: Decimal;
Begin
    st := New Statistics.Create;
    a[0] := 0.85m;
    a[1] := 0.14m;
    a[2] := 0.53m;
    a[3] := 0.28m;
    a[4] := 0.31m;
    s:=st.StDevDcml(a);
    Debug.WriteLine("Standard deviation: " + s.ToString);
End Sub UserProc;

After executing the example the console window displays standard deviation value.