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Lockheed Martin is a supplier for the aerospace industry. Suppose Lockheed is considering switching to Cirus Systems, Inc., a new supplier for one of the

Lockheed Martin is a supplier for the aerospace industry. Suppose Lockheed is considering switching to Cirus Systems, Inc., a new supplier for one of the component parts it needs for an assembly. At issue is the variability of the components supplied by Cirus Systems, Inc., compared to that of the existing supplier. The existing supplier makes the desired part with a mean diameter of 3.75 inches and a standard deviation

of 0.078 inch. Unfortunately, Lockheed Martin does not have any of the exact same parts from the new supplier. Instead, the new supplier has sent a sample of 20 parts of a different size that it claims are representative of the type of work it can do. These sample data are shown here and in the data file called Cirus.

Diameters in inches: 18.018 17.856 18.095 17.992 18.086 17.812 17.988 17.996 18.129 18.003 17.983 18.153 17.996 17.908 18.214 18.313 17.948 18.219 18.079 17.799

Explain in a short letter to Lockheed-Martin indicating which supplier you would recommend based on relative variability.

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