What is the 'Normal Distribution'. The normal distribution, also known as the Gaussian or standard normal distribution, is the probability distribution that plots all of its values in a symmetrical fashion, and most of the results are situated around the probability's mean. Values are equally likely to plot either above or below the mean.
Definition of a Mg. A milligram (mg) is a metric system unit that represents a thousandth of a gram. Because of its larger size, a mg is a more commonly used measurement than a mcg. One thousandth of a mg is one mcg, and 1,000 mcg equal one mg.
The metric unit prefixes are short words that indicate a multiple or fraction of a unit. The prefixes are the same no matter what the unit is, so decimeter means 1/10th of a meter and deciliter means 1/10th of a liter, while kilogram means 1000 grams and kilometer means 1000 meters. Decimal-based prefixes have been used in all forms of the metric system, dating back to the 1790s.