دراسة مقارنة بين طرق التقدير باستخدام معلمتي الشكل و القياس لتوزيع ويبل

Abstract EN

This study aimed to estimate the parameter scale  and the shape parameter  of the Weibull distribution and to compare the estimation methods (Maximum likelihood, Moments, least squares and maximum loss of Minimax) by the mean square error to obtain the best estimate.

Actual data for the monthly wind velocity of Sebha city -Libya were used for 52 years.

The value of median, third quartile, eighty-fifth percentile and the maximum values in each year as measurements and variables of the study.

The statistical package program R was used in the application.

The results showed that the best method of estimation was the maximum loss method Minimax, then the maximum likelihood then moments then lest squares method.

The study also recommended that make comparisons between traditional methods of (Minimum Variance bound and the highest exponential loss function) and the reliance on the eighty-fifth percentile scale in the calculation of wind speed.