Consider the four normal stress and strength distributions described below. Which component would have the highest reliability?
Response:

• A.Both distributions have the same variance but the stress average is slightly higher than the strength average.
• B.Both distributions have the same standard deviation but the strength average is higher than the stress average.
• C.The average and standard deviation of the stress distribution are both higher than for the strength curve.
• D.The average and standard deviation of the stress and strength distributions are the same.

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System and cost effectiveness analysis outputs:
Response:

• A.Can be used to determine the best balance of system performance, cost and schedule.
• B.Do not guide trade-off decisions.
• C.Will not guide preliminary design features.
• D.In most cases will not identify the degree to which innovations should be pursued.

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The reliability of a device comprised of various parts functioning in series is the:
Response:

• A.Sum of the probabilities of the unreliability.
• B.Product of the unreliability
• C.Sum of the reliability.
• D.Product of the reliability.

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Reliability can be specified in terms of all of the following EXCEPT:
Response:

• A.Stress to failure.
• B.Cycles to failure.
• C.Cost of failure
• D.Time to failure.

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The means of large samples from a population tend to be normally distributed around the population mean. This statement is TRUE according to which of the following theorems?
Response:

• A.Central limit.
• B.Camp-Meidel.
• C.Tchebysheffs
• D.Least squares.

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