TABLE 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 Table 12-10, what is the expected number of employees with 1 to 4 years of training time and a high defect rate?
A) 12.00
B) 8.64
C) 6.67
D) 6.00

Question

TABLE 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 Table 12-10, what is the expected number of employees with 1 to 4 years of training time and a high defect rate?
A) 12.00 
B) 8.64 
C) 6.67 
D) 6.00

Quizplus · Accepted Answer

The expected number is calculated based on the proportion of employees with 1 to 4 years of training and a high defect rate, using the data provided in Table 12-10.

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