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Compute quantiles (inverse distribution values) for the non-central t distribution. using Johnson,Kotz,.. p.521, formula (31.26 a) (31.26 b) & (31.26 c)
Note that qt(.., ncp=*)
did not exist yet in 1999, when MM
implemented qtAppr()
.
qtAppr(p, df, ncp, lower.tail = TRUE, log.p = FALSE, method = c("a", "b", "c"))
vector of probabilities.
degrees of freedom
non-centrality parameter
logical, see, e.g., qt()
.
a string specifying the approximation method to be used.
...
qt
.