econ2202 ass1

[Stifler]

any1 worked on it?


any1 has clue on 3rd one?

Average time to failure (years)

wut does it mean?

 

[Stifler]

Model A Model B
Number of units tested 8 10
Average time to failure (years) 7.0 5.5
Sample Variance 1.0 1.7

 

[不想独自快乐]

明天做，不要着急

 

[Stifler]

2 tests on next week..

 

[~鸡蛋壳~]

我们section下周有考试嘛？

 

[Stifler]

I DIDN'T SAY TEST ON ECON2202 YA..

 

[Stifler]

2007 + 2107

 

[不想独自快乐]

偶下2周一共4门考试，3门心理.............现在书还没看呢

 

[不想独自快乐]

第3题的意思是哪一个比较持久，所以null: mean 1-mean 2<=0 alternative:mean 1-mean 2>0

 

[want to play]

good