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PROBT |
Category: | Probability |
See: | CDF, PDF |
Syntax | |
Arguments | |
Details | |
Examples |
Syntax |
PROBT(x,df<,nc>) |
Range: | df > 0 |
Details |
The PROBT function returns the probability that an observation from a Student's t distribution, with degrees of freedom df and noncentrality parameter nc, is less than or equal to x. This function accepts a noninteger degree of freedom parameter df. If the optional parameter, nc, is not specified or has the value 0, the value that is returned is from the central Student's t distribution.
The significance level of a two-tailed t test is given by
p=(1-probt(abs(x),df))*2;
Examples |
SAS Statements | Results |
x=probt(0.9,5); |
0.7953143998 |
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