1. Albedo is a unitless, non-dimensional value that ranges on a scale from 0 to 1

2. Albedo is a non-dimensional, unitless quantity that indicates how well a surface reflects solar energy

3. That piece of data is usually a (unitless) integer or, in some cases, a set of dice.

4. The Coefficient of variation (CV) is a relative measure of variability that indicates the size of a standard deviation in relation to its mean.It is a standardized, unitless measure that allows you to compare variability between disparate groups and characteristics.It is also known as the relative standard deviation (RSD)