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.
by Marissa Hill | Jun 11, 2013 | |. The standard deviation is a mathematical formula for the average distance from the average. This tells you how spread out a group of items is. We donât care about the actual position of the points.Imagine we have two lists of stock prices.y Marissa Hill | Jun 11, 2013 | |. The standard deviation is a mathematical formula for the average distance from the average. This tells you how spread out a group of items is. We donât care about the actual position of the points.