Maximum likelihood for determining Weibull distribution parameters in TI Nspire CX CAS

Numerical method can be applied to determine the parameters for Weibull distribution,such as the Nelder-Mead method previously coded in the TI Nspire CX CAS. Steps below are to determine the maximum likelihood estimates for the 2-parameter Weibull distribution.


On a sample data set with 120 data points, it took 27 minutes 17 seconds for an overclocked Nspire to complete the calculation, and 27 seconds on the PC version with an i5.


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