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

 C.V. = 505! for Log— transformed data 



(a) 



' 25 30 35 40 45 50 55 60 B5 70 75 



ZEROb ADDED TO TmE INITIAL DATA 



S 70 



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

 C.V. = 50?; T:?r Loq— transformed data 



5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 



ZEROS ADDED TO THE INITIAL DATA 



Fig. 2 Results of simulating an increasing proportion of zeros in the moderate-variability data set: a) estimates 

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



DELTA Means 



317 



