Table 7 Availability for automatic identification system for ships (AIS), statistical measures for all base stations. 2011M04, 2011M08 & 2011M12

The Norwegian Coastal Administration - StatRes

7 Availability for automatic identification system for ships (AIS), statistical measures for all base stations. 2011M04, 2011M08 & 2011M12
	2011M04	2011M08	2011M12


Availability
Median	100.00	100.00	99.81
Average	99.85	98.74	99.34
Standard deviation	0.26	2.07	0.77
Mode	100.00	100.00	100.00
Minimum value	97.95	59.70	94.83
Maximum value	100.00	100.00	100.00
Availability last 24 months
Median	99.46	99.48	99.49
Average	98.79	98.94	99.03
Standard deviation	1.19	1.00	0.85
Mode¹	..	..	..
Minimum value	89.53	93.24	95.21
Maximum value	99.85	99.85	99.80

¹	Mode is supressed. In the few cases this statistic comes out with a value it's informational value is still close to nil.

Explanation of symbols