If a sample size of 16 yields an average of 12 and standard deviation of 3, estimate the 95% confidence interval for the population (assume a normal distribution).

• A.Option C
• B.Option A
• C.Option B
• D.Option D

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Which of the following are TRUE statements regarding the use of visual inspection?
I. Reference standards can be used.
II. It provides consistency between inspectors.
III. It is relatively expensive.
IV. It can be quickly performed.

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

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The value for t, when making a two-tailed paired t test, with samples of 13 and alpha =0.05, is

• A.1.711
• B.2.064
• C.1.782
• D.2.179

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The MOST essential value of a surface plate in precision measurement application is which of the following?

• A.It provides a flat working surface.
• B.It provides an accurate reference surface.
• C.It provides a surface free of minor vibration.
• D.It provides a chemically resistant work surface.

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In nonparametric statistics:
I. No assumptions are made concerning the distribution from which the samples are taken.
II. The parameters of the distribution do not relate to the parameters of the sample.
III. The sample and the distribution must have no parameters in common.

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

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