Question 1182841
<pre>
On your TI-84,

press STAT
press the right arrow key twice to highlight TESTS
Scroll down to A:1-PropZInt
Press ENTER

Make the next screen read like this:

                      1-PropZInt
                  x:35
                  n:100
                  C-Level:0.99 
                  Calculate

Scroll down to highlight Calculate
Press ENTER

Read this:

                      1-PropZInt
                   (.22714,.47286) 
                   p̂=.35
                   n=100
        That means:

       0.22714 < p < 0.47286</pre>
Express the same answer using the point estimate and margin of error.<pre>
Notice that if you average the two boundaries of the interval you get point
estimator p̂:

p̂ = {{{(0.22714+0.47286)/2=0.7/2=0.35}}}

The margin of error E is the absolute value difference between the point-
estimator, p̂, and either boundary:

E = |0.22714-0.35| = |0.47286-0.35| = 0.12286

p̂±E =  0.35 ± 0.12286

Edwin</pre>