Returns the Student’s left-tailed t-distribution. 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**:= T.DIST(x,deg_freedom, cumulative)

The T.DIST function syntax has the following arguments:

**X**Required. The numeric value at which to evaluate the distribution**Deg_freedom**Required. An integer indicating the number of degrees of freedom.-
**Cumulative**Required. A logical value that determines the form of the function. If cumulative is TRUE, T.DIST returns the cumulative distribution function; if FALSE, it returns the probability density function.

**Example**: Let’s look at some Excel T.DIST function examples and explore how to use the T.DIST function as a worksheet function in Microsoft Excel:

**Syntax**: =T.DIST(B1,B2,TRUE)**Result**: 0.829553434

**Syntax**: =T.DIST(C1,C2,FALSE)**Result**: 0.000736907

**Note**:

- #NUM! error
**–**Occurs when**:**- The given cumulative is TRUE and deg_freedom < 1.
- The given cumulative is FALSE and deg_freedom < 0.

- VALUE! error
**–**Occurs when the given arguments are non-numeric. - The deg_freedom and tails arguments are truncated to integers.
- #DIV/0 error
**–**Occurs when the given cumulative is FALSE and deg_freedom is equal to 0.