Functions and CALL Routines |
Returns a quantile from the t distribution.
-
p
-
is a numeric probability.
-
df
-
is a numeric degrees of freedom parameter.
-
nc
-
is an optional numeric noncentrality parameter.
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.
Note: TINV is the inverse of the PROBT function.
SAS Statements |
Results |
x=tinv(.95,2);
|
2.9199855804
|
x=tinv(.95,2.5,3);
|
11.033833625
|
Copyright © 2011 by SAS Institute Inc., Cary, NC, USA. All rights reserved.