身高调查，大家都来~

是谁总假设身高是正态分布来着...看来完全不是嘛

作为统计人必须说这个survey有严重self selection bias啊。。。。

什么叫self selection bias呀？手机不好查。。。


- 發送自我的 iPhone 大板凳應用

矮穷丑飘过~ 就不给大家拖后腿了~ (^.^)


- 發送自我的 iPhone 大板凳應用

矮穷丑飘过~ 就不给大家拖后腿了~ (^.^)


- 發送自我的 iPhone
RehsuR 发表于 2011-12-30 13:04

this IS self selection bias....meaning only tall people tend to participate, the result wont be representative of the population.

回复 44# 小K


有道理

i gotta recommend the tiny book "how to lie with statistics" again
really fun little book to go through in an hr, and learn the basic ideas for non-stats kids

this IS self selection bias....meaning only tall people tend to participate, the result wont be representative of the population.
小K 发表于 2011-12-30 13:11

    but this survey does not show the name of the participants. I think they may still participate in

回复 47# 终葵云竹

嗯......
拿我举例吧：我没参加.......

回复  终葵云竹

嗯......
拿我举例吧：我没参加.......
yxyxyx 发表于 2011-12-30 13:48

    可是你投了大家也不知道啊   为什么不投？有点困惑

this IS self selection bias....meaning only tall people tend to participate, the result wont be representative of the population.
小K 发表于 2011-12-30 13:11

    原来如此原来如此。我想起那本书里某个调查名校毕业生月收入的例子了