T.INV (PQL  xl)
This function returns the tvalue of the student's tdistribution as a function of the probability and the degrees of freedom
 Library: PQL \ Spreadsheet \ Statistical
 Compatibility: Any content (regardless of data source) in the Tabulate spreadsheet module
Syntax
T.INV(probability, deg freedom)
Function Arguments
Name  Description  Type  Optional 
probability  Probability of the student’s tdistribution  Number 

deg freedom  Number of degrees of freedom to characterize the distribution; if not an integer, the number is truncated  Number 

Comments
This function is the same as the Microsoft Excel 'T.INV' function  using the same inputs, logic and outputs.