TINV

TINV(probability, degrees_freedom)

Returns the t-value of the distribution as a function of the probability and the degrees of freedom.

probability	The probability associated with the distribution.
degrees_freedom	The number of degrees of freedom.

REMARKS

* T.INV.2T was added in Excel 2010 to replace this function.
* This function is only available for backwards compatibility and should not be used.
* The t distribution is a continuous distribution
* The random variable returned by this function is often referred to as a critical value.
* If "probability" < 0, then #NUM! is returned.
* If "probability" > 1, then #NUM! is returned.
* If "probability" is not numeric, then #VALUE! is returned.
* If "degrees_freedom" < 1, then #NUM! is returned.
* If "degrees_freedom" is not an integer, it is truncated.
* If "degrees_freedom" is not numeric, then #VALUE! is returned.
* You can use the T.DIST function to return the probability distribution function for a t distribution (left tailed).
* You can use the T.DIST.2T function to return the probability distribution function for a two tailed distribution (no cumulative).
* You can use the T.DIST.RT function to return the probability distribution function for a two tailed distribution (no cumulative).
* You can use the T.INV function to return the inverse of the probability distribution function for a t distribution (left tailed)
* You can use the T.TEST function to return the probability value from a t distribution.
* For the Microsoft documentation refer to support.microsoft.com

	A
1	=TINV(100%, 1) = 0.000
2	=TINV(50%, 1) = 1.000
3	=TINV(25%, 1) = 2.414
4	=TINV(10%, 1) = 6.314
5	=TINV(2%, 1) = 31.821
6	=TINV(1%, 1) = 63.657
7	=TINV(0.5%, 1) = 127.321