- 程序有所改变。发帖如还有问题请报告
- 【征集】西西河的经济学,及清流措施,需要主动参与者,『稷下学宫』新认证方式,24年网站打算和努力目标
主题:葫芦僧乱判葫芦案 -- 煮酒正熟
No one would use t-statistic or F-statistic to draw a conclusion without checking the underlying assumptions.
If I remember correctly, the underlying assumptions include (but may not be limited to):
1. Normality;
2. Equal variance (or stable variance);
3. Linearity (no curvature)
4. no influential outliers
I didn't check the Statistics text book so I may miss one or two.
Assumptions checking can be done by the method of residual analysis.
What I'm trying to say here is that, these are the very basic knowledge in statistics. I do not hold any degree in statistics, but I still know that I need to check these assumptions before drawing a conclusion. I just can't imagine that my colleague in the Advanced Analytics team who holds PhD in mathematics and statistics would NOT know this. I think you might have been too subjective in reaching a conclusion that what our company does is not correct.
- 相关回复 上下关系8
压缩 7 层
🙂我个人觉得两组不同质的担心仍然存在 叶少 字148 2007-01-26 02:43:47
🙂As I said before it's not viable 煮酒正熟 字1663 2007-01-26 11:58:10
🙂估计用的是t 检验 栏杆拍编 字273 2007-01-26 08:03:59
🙂I think you're missing the point
🙂那你给说说你们怎么满足第一和第二条的把 栏杆拍编 字1195 2007-01-26 13:00:27
🙂the other thing is 煮酒正熟 字3833 2007-01-26 13:59:50
🙂嗬嗬,没有什么不可接受的 栏杆拍编 字883 2007-01-26 15:05:29
🙂I'm not a statistician 煮酒正熟 字721 2007-01-26 15:38:56