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Step one in a draft test is to turn on all gas-fired appliances in the equipment room.
Standard Deviation
A measure of the amount of variation or dispersion of a set of values, indicating how spread out the data points are.
Range
The difference between the highest and lowest values in a dataset, indicating the spread of the data.
Variability
A statistical measure that describes the dispersion or spread of data points in a data set.
Standard Deviation
A statistical measure of the dispersion or variability of a set of data points around their mean.
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