Skip to main content
← All functions

TDIST function

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.

Syntax

TDIST(x, degFreedom, tails)

Square brackets indicate optional arguments.

Arguments

ArgumentRequiredMeaning
xYesRequired. The numeric value at which to evaluate the distribution.8
degFreedomYesRequired. An integer indicating the number of degrees of freedom.3
tailsYesRequired. Specifies the number of distribution tails to return. If Tails = 1, TDIST returns the one-tailed distribution. If Tails = 2, TDIST returns the two-tailed distribution.1

Try TDIST

Read the legacy TDIST function name

=TDIST(A2,B2,1)

TDIST is the compatibility name corresponding to T.DIST.RT. At one degree of freedom, the left-tail probability at 1 is 0.75, leaving 0.25 to the right. This is a one-sided tail. Use the modern name when creating a new formula; the old spelling is useful when reading existing workbooks.

Inspect the current formula

Read its written arguments or observe actual operation values in a separate local calculation. This action neither applies a draft nor grades an answer.

Read the formula, one argument at a time

Explore the written function calls and their inputs. The calculation result belongs to the complete formula.

TDIST · top-level call

=TDIST(A2,B2,1)

1 / 3 · x

Required. The numeric value at which to evaluate the distribution.

TDIST reference ↗

Follow the cells behind a result

Read explicit local references and helper formulas using a separate calculation. Your draft stays in this field; the worksheet and practice checks do not change.

The worksheet runs locally. Published checks apply to the supplied example only. Native Excel and Google Sheets compatibility remain unverified.

Reference and compatibility

Univer 1.0.4 / Apache-2.0. Calculation checks cover the supplied examples only. The browser worksheet does not implement every Excel feature, external service or connected data type.