Question 1184692
<pre>
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 <u>0.868</u> 
and <u>0.932</u>

Edwin</pre>