FOR THE SAME CIRCULAR PRODUCT PROBLEM: A Quality Analyst wants to construct a control chart to determine whether a machine producing a certain circular product was under control with regards to its diameter. Accordingly, the Analyst sampled four products from the machine with the following diameter in millimeters.

Is the machine producing the circular product $"$in control"?

$\backslash$table$[[$Sample$,$Measurements$],[1,17,15,15,17,],[2,16,25,18,25,],[3,23,24,23,22,]]$

Yes, the machine is $"$in control"

No$,$ the machine is "not in control"

The machine is not capable, so the machine is not in control

It cannot be decided because of incomplete information