SOLUTION: This is two questions I am having an issue with. The only two I cannot figure out. I really would appreciate it if there was a way you could scan the page back and upload it comple

Algebra ->  Probability-and-statistics -> SOLUTION: This is two questions I am having an issue with. The only two I cannot figure out. I really would appreciate it if there was a way you could scan the page back and upload it comple      Log On


   

Question 366576: This is two questions I am having an issue with. The only two I cannot figure out. I really would appreciate it if there was a way you could scan the page back and upload it completed and how you did it? Thank you
Here is the uploaded page with 2 questions:
http://img525.imageshack.us/img525/2033/ccf1105201000000.jpg
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Hmm. Get back to you soon. Got a class to teach.
Back now.
14.
a.) 525%2F1230+%2B-+2.325sqrt%28%28%28525%2F1230%29%2A%28705%2F1230%29%29%2F1230%29. This corresponds to the open interval (0.39404, 0.45962).
b.) No, it is not reasonable to conclude from the sample that the president is doing a good job. In fact we could say that the true proportion may be less than 50%. (As opposed to the null hypothesis that the true proportion is equal to or greater than 50%.)
15.
a.) $63/hr.
b.) Using the t-distribution with 22 degrees of freedom, the C.I. is 63%2B-+%282.508%29%2A%286.1%2Fsqrt%2823%29%29. This corresponds to the open interval (59.81, 66.19).
c.)We use the standard normal table again. We want 1%3E=1.645%2A%286.1%2Fsqrt%28n%29%29. This should give sqrt%28n%29%3E=10.0345, or n%3E=100.69. We can put n = 101.