The remaining sections go as follows. In Section 2, we briefly discuss the
MLE, UBE and their implementations. In Sections 3 to 5 we discuss other
methods. Simulation results and discussions are provided in Section 6. Finally, in
Section 7, we used a real data set as an example to find the six estimators for the
shape parameter ሺߠሻ of exponentiated Gompertz distribution.