Question 236227: 6. Dewey, Cheetum, and Howe is a law firm that handles divorce cases. A previous study showed that in 34% of the time, their client got everything that was requested in the initial divorce papers. How many divorce proceedings would they have to survey to construct a 99% confidence interval for the true proportion of their clients get everything that they wanted in the divorce? If this interval is high enough, it would be a great advertising piece of information.
I have no idea where to start please help me.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Dewey, Cheetum, and Howe is a law firm that handles divorce cases. A previous study showed that in 34% of the time, their client got everything that was requested in the initial divorce papers. How many divorce proceedings would they have to survey to construct a 99% confidence interval for the true proportion of their clients get everything that they wanted in the divorce? If this interval is high enough, it would be a great advertising piece of information.
------------------------------------------
n = [z*s/E]^2
s = sqrt[pq/n]
---
n = [2.5758*sqrt(0.34*0.66)/0.01]^2
---
n = 122.02^2
n = 14888.7
Rounding up n = 14889
==================================
Cheers,
Stan H.
|
|
|
