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
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 |
Defect Rate | High | 6 | 9 | 9 |
Average | 9 | 19 | 23 | |
Low | 7 | 8 | 10 |
If the defect rate and number of years after training period are independent, what is the expected number of employees with 5 to 9 years of training time and a low defect rate?
Answer: Answer (Please provide your answer to 2 decimal places).
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