Subject: Re: normal table use in elementary statistics?
From: Martha Haehl (haehl@kcmetro.cc.mo.us)
Date: Tue Sep 26 2000 - 07:45:51 EDT
I would use both and first present the information (with a simple problem)
on the TI-83, then immediately (the same class period) have students fill in
the table by hand to see where the numbers come from. I would in this
manner do both approaches at the same time on 2 or 3 problems before moving
to technology approaches.
Martha
> I have been teaching statistics for years using the normal table. I use
the
> one that Moore does with the areas cumulative from the left. Many of my
> students now have TI-83s. These TI-83s can give table areas (cumualative
> from the left) or z values from left areas. They can even figure out
> scores (like IQs or women's heights) using the TI-83 normal feature.
>
> Do you think I should still teach them how to use the normal table to do
> the problems or is this approach too old fashioned? If they use a TI-83 I
> guess I worry that they won't really understand what is going on and they
> will have trouble later in the course when things become more complicated.
>
> What do you think?
> 1. Use only the table and formula for z
> 2. Use only the TI-83 approach.
> 3. Use both.
>
> If you pick number 3, which do you think should be taught first? On which
> method should emphasis be placed?
>
> Colleen Ryan
> Oxnard College
> Southern California
>
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