TInterval "Domain Error" on Ti-89...Any ideas?

markzillyway
Sun, 04 Apr 2010 20:35:21 +0000

So i input my list into list1, i choose TInterval after pressing F7, i set my List: to 1 and my Freq: to 1 and my C Level to .90 and all i get is a “Domain Error.” I have no idea what I’m doing wrong. This can come very conveniently during the exam so I’m trying to fix it now. Any ideas?