ASQ
CRE · Question #265
CRE Question #265: Real Exam Question with Answer & Explanation
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Question
A random sample of 100 bars of aluminum shows a tensile strength mean of 30,000 psi and a standard deviation of 3,000 psi. On the basis of this sample, what is the 95 percent confidence interval for the average tensile strength?
Options
- A30,000 ?528 psi
- B30,000 ?600 psi
- C30,000 ?588 psi
- D30,000 ?768 psi
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