难易程度：★★★★
题目题材：生产，管理
gre argument 186题目：
The following is a recommendation from the director of personnel to the president of Professional Printing Company.
"In a recent telephone survey(1) of automobile factory workers, older employees were less likely to report that having a supervisor present increases their productivity. Among workers aged 18 to 29, 27 percent said that they are more productive in the presence of their immediate supervisor, compared to 12 percent for those aged 30 or over, and only 8 percent for those aged 50 or over(2). Clearly, if our printing company(3) hires mainly older employees(4), we will increase productivity and save money because of the reduced need for supervisors."
提纲：
1. Since the survey is a telephone survey, the reliability of its result is suspicious at many aspects, e.g. the size of the sample, who responded to the survey, if the respondents could exactly understand the questions, if the respondents were forthright when answering the questions, etc.
2. The director fails to make any comparison between the actual productivity of different groups of employees.
3. The automobile industry may not be comparable with a printing company.
4.The director fails to consider many negative effects of hiring mainly older employees.
注：题目中括号里的数字表明这句话体现的是提纲中第几号缺陷。
