CONFIDENCE.NORM (PQL  xl)
This function returns the confidence interval for a population mean
 Library: PQL \ Spreadsheet \ Statistical
 Compatibility: Any content (regardless of data source) in the Tabulate spreadsheet module
 Solve: This function can be used with the Solve plugin: both as part of the objective function and constraint functions
Syntax
CONFIDENCE.NORM(alpha, standard dev, size)
Function Arguments
Name  Description  Type  Optional 
alpha  Alpha, significance level used in calculating confidence level, where confidence level is 100 times (1alpha)%  Number 

standard dev  Population standard deviation for the range  Number 

size  Number representing the size of the sample; if not an integer, the number is truncated  Number 

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