
%0 Journal Article
%A Gilmour, AR 
%A Atkins, KD 
%T Modelling the FFDA fibre diameter histogram of fleece wool as a mixture distribution
%J Australian Journal of Agricultural Research
%D 1992/11/01
%V 43
%N 8
%P 1777-1788
%K wool;coarse edge statistics;fibre diameter distribution
%R https://doi.org/10.1071/AR9921777
%U https://www.publish.csiro.au/paper/AR9921777 
%X The histogram of wool fibre diameters obtained by processing fleece samples through the Fibre Fineness Distribution Analyser (FFDA) machine is modelled as a mixture of two normal distributions fitted on the log scale (model iv). The paper compares this model with a single normal distribution on the natural scale (model i), a single normal distribution on the log scale (model ii) and a mixture of two normal distributions on the natural scale (model iii). When fitted to 2544 fibre diameter histograms from Merino hoggets, these models gave average lack-of-fits, distributed as ¿225, of 549.6, 190.1, 93.5 and 39.5 for models i to iv respectively. Model iv is proposed as the basis for describing the FFDA fibre diameter histogram in sheep breeding. 
