Question: Sample data collected by the operator of a lathe process is shown below. The operator took a sample of four parts ( n 4) at
Sample data collected by the operator of a lathe process is shown below. The operator took a sample of four parts (n 4) at six different points in time. The operator measured the outside diameter of each sampled part and listed the results in the table below. The desired tolerance for this part is 7.250 inches + or - .009 inches.

What is the number found in the numerator of the Cp Index?
What is the number found in the denominator of the Cp Index?
What is the value of the Cp Index?
1 7.252 7.254 7.249 7.242 Total Samples Taken 2 3 4 5 7.254 7.249 7.252 7.251 7.250 7.247 7.254 7.244 7.251 7.242 7.253 7.244 7.257 7.240 7.242 7.241 6 7.260 7.266 7.245 7.235 Ave. 7.249 7.253 7.245 7.250 7.245 7.252Step by Step Solution
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