Calculators Ti-89 Statistics Question

  • Thread starter Poisonous
  • Start date
1. Homework Statement

I've been trying, with no success, for the past few hours to find a way to keep calculations done in the TI-89's "Stats/List Editor" in exact form instead of decimal. For example, when I enter the following information:

http://img19.imageshack.us/img19/4061/prob1y.jpg [Broken]

I get:

http://img25.imageshack.us/img25/2123/prob2y.jpg [Broken]

Where I want p1_hat to be 22/36, p2_hat to be 20/23, etc..

3. The Attempt at a Solution

I know in the older TI's you could do something like, Math->exact->p1_hat, and it would give it to you, but if I do Math->numbers->exact()->exact(statvars\p1_hat) I get the following:

http://img11.imageshack.us/img11/9542/prob3.jpg [Broken]

If you know of a way or another program that I can download to get the exact forms, I'd be very grateful!
 
Last edited by a moderator:
press "mode" and change the "Exact/Approx" setting from "Auto" to "Exact". Then re-input your data.
 
I've tried it. It doesn't work with the stats/list editor :(
 
Huh. It did for me.
 
Well, the infomation that I enter shows in exact form, but the calculated information is still is approximte. The p1_hat, for example, still shows as .6111111111.
 

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