### TDIST(x, degrees_freedom, tails)

Returns the percentage points probability for the t distribution.

 x The number from the distribution. degrees_freedom The number of degrees of freedom. tails The number of distribution tails to return:1 = one tailed distribution2 = two tailed distribution

#### Remarks

 * T.DIST was added in Excel 2010 to include a 'cumulative' argument.* T.DIST.RT was added in Excel 2010 to replace this function when "tails" = 1.* T.DIST.2T was added in Excel 2010 to replace this function when "tails" = 2.* The t distribution is a continuous distribution.* If "x" is not numeric, then #VALUE! is returned.* If "degrees_freedom" is not an integer, it is truncated.* If "degrees_freedom" < 1, then #NUM! is returned.* If "degrees_freedom" is not numeric, then #VALUE! is returned.* If "tails" is not an integer, it is truncated.* If "tails" = 1, then the one-tailed distribution is used.* If "tails" = 2, then the two-tailed distribution is used.* If "tails" is any value other than 1 or 2, then #NUM! is returned.* If "tails" is not numeric, then #VALUE! is returned.* In Excel 2010 the accuracy of this function was improved.* For the Microsoft documentation refer to support.office.com

 A 1 =TDIST(0.1,1,1) = 0.468 2 =TDIST(0.1,1,2) = 0.937 3 =2*TDIST(0.1,1,1) = 0.937 4 =TDIST(0.5,1,1) = 0.352 5 =TDIST(1,1,1) = 0.250 6 =TDIST(1,1,2) = 0.500 7 =TDIST(1.5,1,1) = 0.187 8 =TDIST(2,1,1) = 0.148 9 =TDIST(2.5,1,1) = 0.121 10 =TDIST(5,1,1) = 0.063

 1 - This is the probability of a value equal to or greater than 1.96 with 10 degrees of freedom.