Recommend that the firm invest in the new system

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Two teams of workers assemble aircraft navigational systems at a manufacturing plant in Washington. Team 2 uses a new costly manufacturing system that management is considering for the entire operation. A random sample of 150 assemblies from team 1 shows 21 unacceptable assemblies. A similar random sample of 125 assemblies from team 2 shows 12 unacceptable assemblies.

(A) Is there sufficient evidence to conclude, at the 10% significance level, that the new manufacturing system reduces the number of unacceptable assemblies? Conduct the appropriate hypothesis test.

(B) Is there sufficient evidence to conclude, at the 5% significance level, that the new manufacturing system reduces the number of unacceptable assemblies? Conduct the appropriate hypothesis test.

(C) Calculate the p-value and explain how to use it for testing the null hypothesis.

(D) Would you recommend that the firm invest in the new system?

Reference no: EM131468818

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