Econ2201A-assignment 4.

[want to play]

Welcome to post questions and answers here,then we can compare answers each other.

 

[不想独自快乐]

呵呵，今天做，做完了我贴

 

[want to play]

最初由 不想独自快乐 发布
呵呵，今天做，做完了我贴

you are too handsome.

 

[Stifler]

I'M FINISHED IT ALREADY.HEHE
COMPARE ANSWER WITH U SOON

 

[不想独自快乐]

1.153
2.3535
3.set rules,就是if z>什么，reject H0 z alpha=1.88,z=0.055=0.06
4.upper tail positve,lower tail negative,two tails 正负都有
5.z=1.82>1.645,so reject
6.怀疑题目有问题，那个population应该是sigma=40,这样就可以算了，但是错了大家不要怪我

 

[want to play]

ding

 

[Stifler]

2.=3584
z0.005=2.575
s.d=46.5
e=2

then, n=3584.

 

[不想独自快乐]

楼上的你还要减去50，他问的是additional