terms, equation 4. The f(x) were computed using a mean 

 of zero and a standard deviation of one. For skewness, 

 a = ±0. 24, a - were used. For kurtosis, g - 0, 



13 1 



a = ±0.48 were used. 



99.99 



99.9 - 



99 



0.1 



0.01 



LU 

 > 



95 







C£. 











90 







o 









Q- 









LU 



80 



- 





Q 









_u 



70 



- 





< 









LU 

 0£ 



60 



- 





LU 



50 



- 





> 









1— 



40 



— 





<c 









1 



30 



- 





S 











20 



- 





Q 









LU 









N 



10 



_ 





1 









< 









s 









ce 



5 



— 





O 







POSITIVE 





2 





KURTOSIS 





1 







-4-3-2-10 1 2 3 



AMPLITUDE IN STANDARD DEVIATION UNITS 



Figure 10. Curves illustrating positive and negative 

 kurtosis, computed using Edgeworth's series. 



27 



