Natural Gas Reforming/Gasification: Synthesis gas, a mixture of hydrogen, carbon monoxide, and a small amount of carbon dioxide, is created by reacting natural gas with high-temperature steam. The carbon monoxide is reacted with water to produce additional hydrogen.
Measurement scales are used to categorize and/or quantify variables. This lesson describes the four scales of measurement that are commonly used in statistical analysis: nominal, ordinal, interval, and ratio scales. Each scale of measurement satisfies one or more of the following properties of measurement.
3. The conversion of observations to numbers permits the use of mathematical operations to better describe and analyze observations. The numbers that represent observations exist on one of four scales of measurement: nominal, ordinal, interval, or ratio. The scale of measurement is important because it determines the types of mathematical operations and statistical analyses that are appropriate.4.