Title: Treatment of gold outliers from belt samples
Hi Kevin,
 
The arithmetic mean is probably not a very good measure of central tendancy with this skewed data.  An alternative such as that suggested by Isobel Clark may be more realistic.
 
However it may also be benifical to investigate the root cause.  This would seem to be a sampling problem.  Is it possible to increase the size of the the eight samples (Preferably both total split for pulverising  + analyte weight) OR to reduce the particle size of the 1 ton sample prior to splitting?  Because gold is maliable it often difficult to reduce the partical size, often you only succeed in flattening the gold particles!
Regards

David Reid

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