Technique: How To Use A Multimeter. Learn to use a multimeter to test voltage, resistance, and continuity. Every fixer should know their way around a multimeter, which has just north of a zillion uses for testing electronic components and circuits. Follow along to master the three most basic functions of a multimeter.
It is more generally a measure of spread. The mean is a measure of location. The ratio of the standard deviation to the mean is called the coefficient of variation. This can be helpful in distinguishing two data sets that are given in different units.For example if we are comparing economic data from two different countries, the data might be quoted in different currencies. similar ratio is the index of dispersion, which is the square of the standard deviation divided by the mean. In biology, for example, we might look at the locations of trees within a wood. An index of dispersion equal to 1 would indicate a dispersal consistent with a Poisson process, i.e. uniformly at random.
How to Calculate Standard Deviation, Variance - Definition, Formula, Example. How to Calculate Standard Deviation, Variance - Tutorial. Standard Deviation Definition: Standard deviation is a statistical measure of spread or variability.The standard deviation is the root mean square (RMS) deviation of the values from their arithmetic mean. Variance Definition: The square of the standard deviation. A measure of the degree of spread among a set of values; a measure of the tendency of individual values to vary from the mean value.