Laboratory tests of a new polymer prototype yielded the following proportions of a critical compound:
4.2 ppm, 4.1 ppm, 4.7 ppm, 4.9 ppm, 5.3 ppm
What is the sample standard deviation?
Response:

• A.0.498
• B.0.445
• C.0.464
• D.0.475

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Random sampling plans are based on which of the following assumption?
Response:

• A.The process is unstable.
• B.A specific dependency model has been selected.
• C.Every item has an equal chance of being selected.
• D.The data are accurate.

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Basic sources of reliability data are:
I. In-plant testing.
II. Field testing.
III. Operation by user.
Response:

• A.I and II only
• B.I, II, and III
• C.II and III only
• D.I and III only

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The rated breaking strength of a suspension bridge cable is 150,000 pounds. An example using this cable in a derated condition is which of the following?
Response:

• A.The cable as a parallel component.
• B.The cable in a 225,000 pound maximum stress application
• C.The cable in a 75,000 pound maximum stress application
• D.The cable in a 150,000 pound maximum stress application

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A Pareto analysis of field failure data indicates that several significant failure categories are approximately equal in size. The BEST next course of action to take in selecting a category for improvement would be which of the following?
Response:

• A.Select the category that requires the least expense to fix.
• B.Select the category that is easiest to fix.
• C.Take additional data until a more significant category is evident.
• D.Select the category that offers the most overall cost saving.

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