Lifestyle Management
through System Analysis
 

Tukey Control Chart

Control charts are used to analyze progress in personal improvement.  There are many different types of charts. time between charts are used to monitor adherence to plans.  Tukey charts are used to analyze length of exercise or variation in weight.  Tukey was a statistician and developed this technique for exploratory data analysis.  The approach is robust and makes no assumptions regarding the distribution of outcomes plotted. 

In a control chart, you monitor progress over time.  You create a plot, where the X-axis is days or weeks since  start and the Y-axis is the outcome you are monitoring.  To decide if your  outcomes are different from historical patterns, the upper (UCL) and lower  control limits (LCL) are calculated.  These limits are organized in such a  way as to make sure that if your historical pattern has continued then 99% of  time data will fall within these limits.  This section shows you how to  calculate limits for Tukey charts - a type of chart useful for analyzing single  observations per time period. Details are provided here.

This page is part of the course on Lifestyle Management  This page was first prepared on January 1990 and last revised 03/18/2023.   Copyright protected by Farrokh Alemi,  Ph.D. .