One criterion used to evaluate employees in the assembly section of a large fact

Question

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 Table 11-10, 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? x^2 test for variance x^2 test for differences among more than two proportions x^2 test for independence none of the above

Explanation / Answer

ANSWER ; option (c)

chi square test for independence is used to properly analyze the data

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