ABSTRACT
The point can be made by converting the scale into a different form of units to see whether the ratio between two points remains the same. If the height example is changed to inches, where every inch is the equivalent of 2.54 centimetres and zero centimetres is the same as zero inches, the shorter person is 39.37 inches tall and the taller person is 78.74 inches tall. The conversion has not changed the ratio between the two people: the first person is half the height of the second person. However, if we convert the temperatures from Celsius to Fahrenheit, we get 104 degrees and 176 degrees respectively. Notice that the first temperature is now clearly not half the second one. Fortunately, for any reader who may still not understand the distinction between interval and ratio scales, the statistics covered in this book treat ratio and interval data in the same way.
