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.
1 Answer. As metric units of measurement to quantify weight, 1000 micrograms (mcg) equal 1 milligram (mg). An IU (International Unit) is a unit of measurement for vitamins and other specific biologically active substances. The equivalency of one IU differs from substance to substance and is established by international agreement for each substance.