âº EVC System. A disabled refuge is a relatively safe area within a building or exit staircase for mobility impaired occupants, allowing building management and emergency services to safely assist these people from the building.
Standard deviation is a number used to tell how measurements for a group are spread out from the average (mean), or expected value. A low standard deviation means that most of the numbers are very close to the average. A high standard deviation means that the numbers are spread out.
Report Abuse. Standard deviation is the average distance of each piece of data from the mean. For your example, if the average (mean) score on the test is 66% with a S.D. of 16, this means that 67% of the members of your class had scores in the 66+/-16 points range. The 67% is by definition.eport Abuse. Standard deviation is the average distance of each piece of data from the mean. For your example, if the average (mean) score on the test is 66% with a S.D. of 16, this means that 67% of the members of your class had scores in the 66+/-16 points range. The 67% is by definition.