hypothesis is then rejected by the test if both moments of the 

 sample are significant at the 5 per cent level, and also if 

 either moment is significant at the 1 per cent level. 



Table 2 lists the sample for which the 3rd and/ or 4th 

 moments were found to be significantly different from the 



TABLE 2. 



NUMBER OF CURVES SHOWING SIGNIFICANT VALUES 

 OF SKEWNESS AND KURTOSIS. 



SAMPLE 

 NO. 



g, (SKEWNESS) 



g 2 (KURTOSIS) 





5% 



1% 



5% 



1% 



COMMENTS 



13 s 



X 





X 





BIOLOGICAL NOISE 



17 







X 





CLEAN NOISE 



20* 







X 



X 



BIOLOGICAL NOISE 



21* 







X 



X 



LOW-FREQ. HUM, CLANKS 



23 







X 





CLEAN NOISE 



27 s 







X 



X 



SHIP NOISE 



28 s 







X 



X 



CLEAN NOISE 



29* 



X 





X 



X 



MOSTLY CLEAN NOISE 



42 







X 





SHIP NOISE 



50* 







X 



X 



ICE NOISE 



51* 







X 



X 



ICE NOISF 



52 







X 





ICE NOISE 



57 s 



X 



X 



X 



X 



ICE NOISE, 60 C/S 



60 s 







X 



X 



60 C/S 



62* 







X 



X 



60 C/S 



69 







X 







84* 







X 



X 





100* 







X 



X 





135* 



X 



X 







ALL THE FOLLOWING 



138 



X 









ARE SHIP NOISE 



139* 



X 



X 







SAMPLES 



142 







X 







143* 



X 



X 



X 



X 





147 







X 







149 







X 







150* 







X 



X 





151* 







X 



X 





159 







X 







163* 







X 



X 





"Hypothesis rejected for that sample. 



31 



