Step 3: Identify which points failed each test. Step 2: Examine the Xbar chart to determine whether the process mean is in control. Note that we have an estimate for the population parameter mu anytime you see a hat over the population parameter, it means that its an unbiased estimate. The first step is to estimate the process average. A copy of the license is included in the section entitled GNU Free Documentation License. Step 1: Examine the R chart to determine whether the process variation is in control. Our learning objective is to assess capability from an Xbar and R chart for data that is normally distributed. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 true true
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