INITIAL DATA; 100 nonzero Log-Normal obs, (.Geom. Mean = 7.39) 

 CV. = 75)t for Log— transformed data 



(a) 



ii-__j* ' 



n 5 10 15 20 25 30 35 40 45 50 55 60 55 



ZEROS ADDED TO THE INITIAL DATA 



INITIAL DATA; lOO nonzero Log-Normal obs. ^Geom. Mean = 7.39) / 



G.V. = 75x tor Log— transformed data / 



/ 



/ 



(b) 



/ 



/ 



\ 



,v 



/ 



i^pla MEDIAN s/ 



/ 

 / 



Z' 



- X ^- i ^ 



^ 



GEOMETRIC moan 



5 10 15 20 25 30 35 40 45 50 55 fcO 65 70 75 



ZEROS ADDED TO THE INITIAL DATA 



Fig. 3 Results of simulating an increasing proportion of zeros in the high-variability data set: a) estimates of 

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



318 



