of variability. For example, range can be used in industrial quality control to check either raw materials or products. Through charting, the range of small samples taken at regular intervals of time may be monitored. Range is also used throughout the print and electronic media. For instance, the weather forecasts typically include both expected high and expected low temperatures. Moreover, the daily range of individual stock prices is given by certain newspapers. In fact, range finds fairly widespread application. For example, a magazine about surfing might describe wave size as "fluctuating between 12 and 18 feet."
Applied Statistics: The Arithmetic Mean
Statistical analyses often involve finding a data group's central location. This central location may include, for instance, the middle or most typical items contained within a population. Such values can be crudely described as averages.
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