A Manufacturing Company Produces Part QV2Y for the Aerospace Industry

question 52

Multiple Choice

A manufacturing company produces part QV2Y for the aerospace industry.This particular part can be manufactured using 3 different production processes.The management wants to know if the quality of the units of part QV2Y is the same for all three processes.The production supervisor obtained the following data: Process 1 had 29 defective units in 240 items,Process 2 produced 12 defective units in 180 items,and Process 3 manufactured 9 defective units in 150 items.At a significance level of .05,we performed a chi-square test to determine whether the quality of the items produced appears to be the same for all three processes.What is the null hypothesis?

• A) H₀: The number of defectives produced is independent of the production process used.
• B) H₀: The row and column variables are associated with each other.
• C) H₀: The proportion of defective units produced by the three production processes is the same.
• D) Both "H₀: The number of defectives produced is independent of the production process used." and "H₀: The proportion of defective units produced by the three production processes is the same." are correct or at least acceptable ways of stating the null hypothesis.
• E) All of the other choices are acceptable ways of stating the null hypothesis.

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Definitions:

Transactions

The action of conducting business, trade, or an agreement between two or more parties.

UCC

The Uniform Commercial Code, a comprehensive set of laws governing commercial transactions in the United States to harmonize the law among the states.

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Wheat that has been collected from fields, typically after growing and maturing over a season, and is ready for processing or sale.