Well...The interval is the DIFFERENCE between a number to the next on a scale.The scale is the SERIES OF NUMBERS starting at 0 to another number on the top of a graph. For example.... If the graph...
I've included a couple of links which should explain better the differences among the four levels of measurement: Nominal, Ordinal, Interval and Ratio. The nominal level can be thought of as the...
Interval scales have measurements which are an equal distance from each other. For example, the difference between a temperature of 70 degrees and 80 degrees is 10, which is the same as the...