1998RePEc: Research Papers in EconomicsRequires access

WBULL: Stata module to fit Weibull distribution by maximum likelihood

Nicholas J. Cox

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Abstract

wbull fits a Weibull distribution to a single variable by the method of maximum likelihood. Frequency weights may be used to fit variables given in frequency distribution form. The distribution is here parameterised by a scale parameter b and a shape parameter c. This is for users of Stata 5, 6 or 7. Users of Stata 8 up should use weibullfit instead.

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What this paper is about

wbull fits a Weibull distribution to a single variable by the method of maximum likelihood. Frequency weights may be used to fit variables given in frequency distribution form. The distribution is here parameterised by a scale parameter b and a shape parameter c. This is for users of Stata 5, 6 or 7. Users of Stata 8 up should use weibullfit instead.

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Available abstract

wbull fits a Weibull distribution to a single variable by the method of maximum likelihood. Frequency weights may be used to fit variables given in frequency distribution form. The distribution is here parameterised by a scale parameter b and a shape parameter c. This is for users of Stata 5, 6 or 7. Users of Stata 8 up should use weibullfit instead.

Key concepts: Weibull distribution, Statistics, Maximum likelihood, Shape parameter, Mathematics, Scale parameter, Variable (mathematics), Scale (ratio)

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