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.
The interval scale possesses all the characteristics of an ordinal scale, but it also allows the researcher to compare the difference between the objects. The interval scale is characterized by a constant or equal interval between the values of the scale. This means the difference between any two values is equivalent to the difference between any two adjacent values of an interval scale. Such as, the difference between 1 and 2 on a scale is same as that of the difference between 3 and 4 on the scale. The most common example is a Celsius temperature scale in which the difference between the values is same. In the case of interval scales, the distance between the descriptors is also known.