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Functions and CALL Routines

TINV Function



Returns a quantile from the t distribution.
Category: Quantile

Syntax
Arguments
Details
Examples
See Also

Syntax

TINV(p,df<,nc>)

Arguments

p

is a numeric probability.

Range: 0 < p < 1
df

is a numeric degrees of freedom parameter.

Range: df > 0
nc

is an optional numeric noncentrality parameter.


Details

The TINV function returns the pth quantile from the Student's t distribution with degrees of freedom df and a noncentrality parameter nc. The probability that an observation from a t distribution is less than or equal to the returned quantile is p.

TINV accepts a noninteger degree of freedom parameter df. If the optional parameter nc is not specified or is 0, the quantile from the central t distribution is returned.

CAUTION:
For large values of nc,

the algorithm can fail. In that case, a missing value is returned.  [cautionend]

Note:   TINV is the inverse of the PROBT function.   [cautionend]


Examples

SAS Statements Results
x=tinv(.95,2);
2.9199855804
x=tinv(.95,2.5,3);
11.033833625


See Also

Functions:

QUANTILE Function

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