SOLUTION: Out of 600 people sampled, 540 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids. Give your answers as decimals

Algebra ->  Equations -> SOLUTION: Out of 600 people sampled, 540 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids. Give your answers as decimals      Log On


   

Question 1184692: Out of 600 people sampled, 540 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids.
Give your answers as decimals, to three places
I am 99% confident that the proportion of people who have kids is between_____
and_____.
Answer by Edwin McCravy(20063) About Me  (Show Source):
You can put this solution on YOUR website!
On your TI-84

Press 2ND ON CLEAR

Press STAT ALPHA MATH

Make the screen read this way:

    1-PropZInt
x:540
n:600
C-level:0.99
Calculate

Use down arrow key to highlight Calculate

Press ENTER

Screen reads
       1-PropZInt
(0.86845,0.93155)    <--round those to 0.868 and 0.932
p̂=0.9
n=600

I am 99% confident that the proportion of people who have kids is
between 0.868 
and 0.932

Edwin