FREQUENCY HISTOGRAM: NUMBER OF DIVES PER SIX HOUR 



SUMMARY PERIOD 

 PTT 840 



PERIODS 1-4 COMBINED 

 # PERIODS = 17 

 total # dives =2,370 

 X =139 sd =96 



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16-05:15 GMT (1) X=141 SD = 59 N = 4 

 16-11:15 GMT (2) X = 66 SD = 7 N = 4 

 16-17 15 GMT (3) X=137 SD = 81 N = 5 

 16-23:15 GMT (4) X=215 SD=129 N=4 



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NUMBER OF DIVES 



Figure 49. Frequency histogram of the number of dives during all 6-hour summary periods 

 for PTT #840. See note in Figure 42. 



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