What is T.INV function in Excel? T.INV function is one of Statistical functions in Microsoft Excel that returns the left-tailed inverse of the Student’s t-distribution. Syntax of T.INV function T.INV(probability,deg_freedom) The T.INV function syntax has the following arguments: Probability: The probability associated with the Student’s t-distribution. Deg_freedom:  The number of degrees of freedom with which to characterize the […]