How Do You Interpret The Mean & Standard Deviation On A Control Chart?
A control chart is a statistical process control used to show and study how a particular process changes over time. The standard control chart measures current numbers and pits them against historical averages. The tools of mean and standard deviation are used to determine how far off course a particular year may be against the average of all past years. Obtain a control chart that is complete with current information and historical averages already plotted into a diagram. The numbers used can be a variety of things, including sales numbers in dollars, units sold, visitors to an establishment, etc. Check to make sure the information is accurate before continuing. Calculate the mean of the current numbers on the chart. By definition, the mean is simply the average of all numbers being used in the measurement process. To find the mean, add up all of the numbers being used and divide the total by the total number of elements being counted. Once you have the mean, you can use it to determi
