6.2575 
Fig. 5.27c. Estimated by nonparametric method. 
6.25 
5.00 
3.75 
2.50 
1.25 
0.00 7 7 
0.00 0.06 0.12 0.19 0.25 0.31 0.37 0.44 0.50 
Fig. 5.27d. Estimated by AR model fitting, AR(6). 
Fig. 5.27. (Continued) 
151 
