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EXCEL T.INV.2T FUNCTION
Excel T.INV.2T Function Introduction
The Excel T.INV.2T function computes the inverse of the two-tailed Student’s T Distribution, a continuous probability distribution commonly used for testing hypotheses on small sample data sets.
Description of Excel T.INV.2T Function
Syntax :
=T.INV.2T( probability, degrees_freedom )
Parameters :
- probability – The probability (from 0 to 1) at which you need to calculate the inverse of the 2-tailed Student’s T Distribution.
- degrees freedom – The amount of degrees of freedom required (must be 1).
Step By Step Guide of T.INV.2T Function
Example :
The right graphic represents the two-tailed Inverse Student’s T Distribution with ten degrees of freedom.
If you wish to determine the value of this function for a probability of 0.25, use the Excel T.Inv.2t function as shown below:
=T.INV.2T ( 0.25, 10 )
This provides the value 1.221255395.
If you wish to find the value of the one-tailed inverse Student’s T-Distribution with a probability of 0.25, just double the probability:
=T.INV.2T ( 0.5, 10 )
This produces the value 0.699812061.
Key Points
- To compute the output of the T.Inv.2t function, Excel employs an iterative process, attempting to find a result, x, such that T.DIST.2T(x, degrees freedom) = probability.
- The T.Inv.2t Function in Excel computes the inverse of the two-tailed Student’s T Distribution.
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