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

question 47

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. $$\begin{array} { r r | | c c c } & & { \text { Years Since Training Period } } \\& & < 1 \text { Year } & 1 - 4 \text { Years } & 5 - 9 \text { Years } \\\hline \hline { \text { Defect Rate: } } & \text { High } & 6 & 9 & 9 \\& \text { Average } & 9 & 19 & 23 \\&\text { Low } & 7 & 8 & 10\end{array}$$
-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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Definitions:

Organ Of Corti

The Organ of Corti is the sensory organ located within the cochlea of the inner ear, essential for converting sound vibrations into electrical signals for the brain to interpret.

Located

The specific area or position where something is situated or placed.

Amino Acids

Organic compounds that combine to form proteins and are used by the body to repair tissues and synthesize enzymes and hormones.

Glutamate

An amino acid that serves as a key neurotransmitter in the brain, involved in learning and memory.