Tcdf
Tcdf-func
Description
Computes the probabilities of the specified tail type tail, associated with a cumulative distribution function of Student's t-distribution with the degree of freedom df.
Syntax
double prob = tcdf(double t, double df[, int tail])
Parameters
t
- Input, the value of the Student's
/math-e358efa489f58062f10dd7316b65649e.png "t")
variate.[/math-3c8f68b6e6c5f5943d2602dcf3b38bb7.png "-\infty,+\infty")
]
df
- Input, the degrees of freedom,
/math-4fdefba26320686bb2bd0579a0df421c.png "\nu")
, of the Student's t-distribution.(/math-8b9e99e86655fb9fd858f8c9436a6997.png "df\geq 1")
)
tail
-
Input, Optional. The tail probability type using for the Student's t-distribution
- 1 = the for upper tail probability
- 2 = the lower tail probability (Default if not set)
- 3 = the two tail (significance level) probability
- 4 = the two tail (confidence interval) probability
prob
- Output, the probability.
Example
tcdf(38.9036068506926,30, 3)=; // ANS: 3.110454711125E-27