process capability analysis is conducted at EC$-$Jet Engines, which makes and repairs compressor parts

for jet engines. The Six Sigma Green Belt person collected the data for three operators, two trials, and

ten parts, as given in DataLab$2\_\_$q$2\_\_$processCapability.xlsx$.$

The part specification is $4\mathrm{.}7\backslash$pm $0\mathrm{.}1$ inches.

a$)$ Calculate the process capability index $($Cp$)$ for the parts