Acetone is also very useful because it is miscible (mixable) with all common solvents and water and thus most common paints, finishes and coloring products. So acetone can be added in significant percentages to most of the coating materials we use. Also important, acetone is the fastest evaporating and one of the strongest of all commonly available solvents and it is very dry (non-oily). So it makes an excellent cleaner and degreaser and this is how it is used in most other industries.
The standard form of any distribution is the form that has location parameter zero and scale parameter one. It is common in statistical software packages to only compute the standard form of the distribution. There are formulas for converting from the standard form to the form with other location and scale parameters.
The shape of the distribution is determined by the average, X, and the standard deviation, s. The highest point on the curve is the average. The distribution is symmetrical about the average. Most of the area under the curve (99.7%) lies between -3s and +3s of the average.