ST361 HW7 (due Thursday 10/31/13)
(a) Show your work in order to earn the full credit. This means that you have to present your
steps or explain your reasoning for the answers you obtain, rather than just to write down the
answer itself.
Note that answers without steps or reasoning will receive 0 credits even if the answers are
correct!
(b) Remember to staple your homework and write your name on your homework. You’ll
lose 5 points if not.
---------------------------------------------------------------------------------------------------------1) 7.14 (p.302) (a)(b)
For (a), assume that the population SD () is known to be 0.163.
2) 7.15 (p.302) (b)
3) 7.38 (p.320)
4) 7.49 (p.326)

Note that df 
 
11.32
6
11.32
6
2
5
2
 8.83

2
 

8.32
8
= 8.83.
2
7
5) 7.74 (d)
2

 91 .9681 35 .5216 




10 
 10
Note that df  
2
91 .9681 10   35 .5216 10 2

9
9



  15 .05



1