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.
Years Since Training Period
< 1 Year 1 - 4 Years 5 - 9 Years
High 6 99
Defect Rate: 9 19 23
Averago 7 8 10
Low
Referring to Scenario 12-10, what is the expected number of employees with less than 1 year of training time and a high defect
rate?