# T.INV.2T

## Definition

Calculates the inverse of the two-tailed TDIST function.

### Sample Usage

`T.INV.2T(0.35, 1)`

`T.INV.2T(A1, A2)`

### Syntax

`T.INV.2T(probability, degrees_freedom)`

`probability`

- The probability associated with the two-tailed t-distribution.Must be greater than

`0`

and less than`1`

.

`degrees_freedom`

- The number of degrees of freedom.Truncated to an integer in the calculation if a non-integer is provided as an argument.

Must be greater than or equal to

`1`

.

### Notes

`T.INV.2T`

is to be used for the inverse of two-tailed`TDIST`

functions.`T.INV.2T`

is synonymous with`TINV`

.To calculate the negative inverse of the one-tailed

`TDIST`

function, use`T.INV`

.Both arguments to

`T.INV.2T`

must be numeric or a destination cell whose value is numeric.

### See Also

`TDIST`

: Calculates the probability for Student's t-distribution with a given input (x).

`TINV`

: Calculates the inverse of the two-tailed TDIST function.

`T.INV`

: Calculates the negative inverse of the one-tailed TDIST function.

### Examples

In this example, `T.INV.2T`

uses the probability associated with a Student's two-tailed t-distribution and degrees of freedom to return its result.

#### In order to use the T.INV.2T formula, start with your edited Excellentable:

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