AA39 求思路

乱世青蛙

The following appeared in an Avia Airlines departmental memorandum.
“On average, 9 out of every 1,000 passengers who traveled on Avia Airlines last year filed a complaint about our baggage-handling procedures. This means that although some 1 percent of our passengers were unhappy with those procedures, the overwhelming majority were quite satisfied with them; thus it would appear that a review of the procedures is not important to our goal of maintaining or increasing the number of Avia’s passengers.”
Discuss how well reasoned... etc.
我暂时想到的flaws：不一定所有不满意的人都写投诉信了；去年的情况不一定适用于现在和以后

729551316AWSS

恩 没错 还有以下错误：
1、vague data  样本总量没告诉 是否随机抽样 这个调查是怎么进行的
2、证据不充分就建立联系，急于概括