Question 1
While choosing a friend, which of the following characteristics do you care about most: honesty, loyalty or sense of humor? Explain why this characteristic is the most important to you?
Question 2
Some people prefer reading newspapers or magazines to get news; others prefer watching television or listening to radio to get news. Which way do you prefer and why? Include details to support your explanation.
Question:Explain the woman’s opinion towards the suggestion and why she holds that opinion.
Question 4
Reading part
Listening part
定义sample error happened when the smaller part of the large group cannot represent the situation of the large group。因为在做统计的时候,total group is too big,所以研究者必须抽取样本来代表整体,但错误的抽样会导致错误的结论。
教授举例,他有个朋友要研究某个湖里鱼的数量,当然他不可能把所有的鱼都抓起来,所以他用了抽样法。于是用net在lake里面网起一定数量的鱼。本来认为网起来的会有大鱼、中鱼、小鱼,却surprised 发现没有网到Small size的鱼,然后判断湖里面没有小鱼。后来发现其实湖里面是有小鱼的,只是网眼大于1cm,所以网不到小鱼,因此网里面没有不代表湖里面没有这就是sample error,也就是没这些样本无法代表全体。作者: bigpig 时间: 2010-9-17 16:22