INITIAL DATA: lOO nonzero Log-Normal obs. (Geom. Me 

 C.V. = 255! for Log— transformed data 



7.39) 



(a) 



30 



35 



40 



45 



50 



ZEROS ADDED TO THE INITIAL DA", A 



INITIAL DATA: 100 nonzero Log-Normal obs. tGeom. Mean = 7.39) 

 C.V. = 25Jr Tor Log— transformed data 



(b) 



20 25 30 35 40 45 50 ! 



ZEROS ADDED TO THE INITIAL DATA 



Fig. 1 Results of simulaling an increasing proportion of zeros in the low-variability data set: a) estimates of 

 the four statistics; b) widths of the 95%C/'s normalized as a percentage of the estimated statistics. 



316 



