COVAR (PQL  xl)
This function returns the confidence interval for a population mean
 Library: PQL \ Spreadsheet \ Compatibility
 Compatibility: Any content (regardless of data source) in the Tabulate spreadsheet module
Syntax
Function Arguments
Name  Description  Type  Optional 
array1  Contain numbers, names, arrays, or references that are numeric. If some cells do not contain numeric data, they are ignored, sets should be the same size, with the same number of data points, sets should not be empty, nor should the standard deviation of their values equal zero  StringOrNumber 

array2  Contain numbers, names, arrays, or references that are numeric. If some cells do not contain numeric data, they are ignored, sets should be the same size, with the same number of data points, sets should not be empty, nor should the standard deviation of their values equal zero  StringOrNumber 

Comments
This function is the same as the Microsoft Excel 'COVAR' function  using the same inputs, logic and outputs.