The specifications for the diameter of a molded part are 10 mm ± 0.5 mm.The actual average and standard deviation from 250 parts sampled is 10.1 mm and 0.1 mm,respectively.The process can be characterized as:
A)Capable.
B)Unreliable.
C)Just barely capable.
D)Out of control.

Question

Quizplus · Accepted Answer

The process is capable because the actual average (10.1 mm) is within the specified limits (9.5 mm to 10.5 mm) and the small standard deviation (0.1 mm) indicates that the process is consistently producing parts close to the target measurement.

The Specifications for the Diameter of a Molded Part Are