Applies ToSharePoint Server 订阅版 SharePoint Server 2019 SharePoint Server 2016 SharePoint Server 2013 SharePoint Server 2013 企业版 Microsoft 365 中的 SharePoint SharePoint Foundation 2010 SharePoint Server 2010 Microsoft 365 小型企业版中的 SharePoint Windows SharePoint Services 3.0

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,degrees_freedom,tails)

X     is the numeric value at which to evaluate the distribution.

Degrees_freedom     is an integer indicating the number of degrees of freedom.

Tails     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.

Remarks

  • If any argument is nonnumeric, TDIST returns the #VALUE! error value.

  • If degrees_freedom < 1, TDIST returns the #NUM! error value.

  • The degrees_freedom and tails arguments are truncated to integers.

  • If tails is any value other than 1 or 2, TDIST returns the #NUM! error value.

  • TDIST is calculated as TDIST = p( x<abs(X)), where X is a random variable that follows the t-distribution.

Examples

X

Degrees

Formula

Description (Result)

1.96

60

=TDIST([X],[Degrees],2)

Two-tailed distribution (0.054644927 or 5.46 percent)

1.96

60

=TDIST([X],[Degrees],1)

One-tailed distribution (0.027322463 or 2.73 percent)

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