To obtain information on the corrosion-resistance properties of a certain type o

Question

To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens arc buried in soil for a 2-year period. The maximum penetration (in mils) for each specimen is then measured, yielding a sample average penetration of X = 52.7 and a sample standard deviation of s=4.8. The conduits were manufactured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demonstrated conclusively that the specification has not been met. Carry out an appropriate hypothesis test at a=0.05. State the null and alternative hypotheses. Calculate the test statistic Define the rejection region. Make a decision about the test.

Explanation / Answer

To obtain information on the corrosion-resistance properties of a certain type o

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.