The X Control Limits: UCL and LCL are wrong and for R Control Limits: UCL and LCL are wrong as well. Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise.

The depth of a keyway is an important part quality characteristic. Samples of size $n=5$ are taken every four hours from the process and $20$ samples are summarized as follows:

$\backslash$table$[[$Sample$,\stackrel{}{x},r$