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does anyone know how to use their Graphic Display Calculator to find the mean in a grouped frequency table?

i can do it without it.. but i also need to know how to use the GDC.. i've got the TI-84 Plus texas instrument.. (like in the attachment)

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I am not sure what exactly you are trying to calculate. I found online [b][url="http://education.ti.com/guidebooks/graphing/84p/TI84PlusGuidebook_Part2_EN.pdf"]manual for TI-84 (click)[/url][/b], where you should find everything you want to know about this (great) GDC.

Parts of the manual, which I think should answer your question are:
(Page 310)
(Page 593)

I hope this helps you. <_<

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Go to Stats --> Edit --> Feed the mid point values in L1 ---> Freq in another column (L2).

Now Press 2nd + Mode to quit. Press clear button to clear the screen. Now, press Stat button --> press the right button that will take you to Calc options ---> then take the first option that is 1 - Var Stats --> Enter
U will see everything that is needed. Press the down button to see IQR, median, extra...

Hope that helps <_<

Regards and Cheers

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