SCENARIO 12-10
One Criterion Used to Evaluate Employees in the Assembly

question 125

Multiple Choice

SCENARIO 12-10
One criterion used to evaluate employees in the assembly section of a large factory is the number of defective pieces per 1,000 parts produced.The quality control department wants to find out whether there is a relationship between years of experience and defect rate.Since the job is repetitious,after the initial training period any improvement due to a learning effect might be offset by a loss of motivation.A defect rate is calculated for each worker in a yearly evaluation.The results for 100 workers are given in the table below.

-Referring to Scenario 12-10,which test would be used to properly analyze the data in this experiment to determine whether there is a relationship between defect rate and years of experience?

• A)\(\chi\) ² test for independence
• B)\(\chi\) ² test for differences among more than two proportions
• C)Wilcoxon rank sum test for independent populations
• D)Kruskal-Wallis rank test

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