Question 1182875
<pre>

Use your TI-84 calculator

press stat, highlight TESTS, then press 8

If your calculator is not too old, you will see a screen that you can
make read like this:

            TInterval
     Inpt:Data Stats 
     x̄:40
     Sx:13
     n:13 
     C-Level:0.99
     Calculate

Scroll down to highlight Calculate then press enter.

You will see this screen:

            TInterval     
     (28.987,51.013)
     x̄=40
     Sx=13
     n=13

The confidence interval is 28.987 < &mu; < 51.013

Edwin</pre>