Reading Data Spread with Standard Deviation

Standard deviation describes how spread out data are around the mean. It helps show how tightly values cluster near the center and how far they sit from that central value. Many large data sets follow a Gaussian distribution, also called a normal distribution.

A Gaussian distribution has a bell-s...

A plot of relative deviation from the mean and its frequency of occurrence appears as a Gaussian curve. This probability distribution curve of a population can be described by the population mean and standard deviation.

The standard deviation measures the spread of clustered data about the mean.

When the standard deviation is lower...