  This note shows that the results presented by Jabbari Nooghabi et al. (2010)
do not hold in all expected cases. With this, the technique proposed by Kumar
and Lalhita (2012) for detecting upper outliers in Gamma samples is also not
valid. Specifically, this note shows that the probability density functions
(pdf) under the null hypothesis of the test statistics therein proposed are not
always valid.

Computation