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

question 58

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, for the cell with 1 to 4 years of training time and a high defect rate, what is the contribution to the overall $\chi$ 2 statistic for the independence test?

• A)0.36
• B)0.1296
• C)0.015
• D)0.0144

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