WCHS: Warren County High School (Warren County, Tennessee) WCHS: Warren Central High School (Indianapolis, Indiana) WCHS: White County High School: WCHS: Wesley Chapel High School (Wesley Chapel, FL) WCHS: Willow Canyon High School (Surprise, Arizona) WCHS: Western Canada High School (Calgary, Alberta Canada) WCHS: Wirt County High School (West Virginia) WCHS
Standard deviation is the average or mean of all the averages for multiple sets of data. Scientists and statisticians use the standard deviation to determine how closely sets of data are to the mean of all the sets.
Standard deviation plots can be used with ungrouped data to determine if the standard deviation is changing over time. In this case, the data are broken into an arbitrary number of equal-sized groups. For example, a data series with 400 points can be divided into 10 groups of 40 points each.