The maximum-likelihood estimators for the
scale parameters of a gamma distribution are computed due to the method of Bhattacharya (2001).
vector of positive valued observations
returns a bivariate vector containing (
scale) estimated parameter vector.
Bhattacharya, B. (2001) "Testing equality of scale parameters against restricted alternatives for m ≥ 3 gamma distributions with unknown common shape parameter". Journal of Statistical Computation and Simulations, 69(4):353-368, DOI
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