The TDIST function is one of the statistical functions. Returns the Percentage Points (probability) for the Student t-distribution where a numeric value (x) is a calculated value of t for which the Percentage Points are to be computed. The t-distribution is used in the hypothesis testing of small sample data sets. Use this function in place of a table of critical values for the t-distribution.
The TDIST function syntax is:
TDIST(x, deg-freedom, tails)
x is the value at which the function should be calculated. A numeric value greater than 0.
deg-freedom is the number of degrees of freedom, an integer greater than or equal to 1.
tails is a numeric value that specifies the number of distribution tails to return. If it is set to 1, the function returns the one-tailed distribution. If it is set to 2, the function returns the two-tailed distribution.
The values can be entered manually or included into the cells you make reference to.
To apply the TDIST function,
- select the cell where you wish to display the result,
- click the Insert function icon situated at the top toolbar,
or right-click within a selected cell and select the Insert Function option from the menu,
or click the icon situated at the formula bar,
- select the Statistical function group from the list,
- click the TDIST function,
- enter the required arguments separating them by commas,
- press the Enter button.
The result will be displayed in the selected cell.
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