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Topic: Experimental design
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Louise Hilton

Posts: 40
Registered: 12/6/04
Experimental design
Posted: Jan 5, 1997 11:42 AM
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Hi, Everyone.. Thanks to Chris for his comments to apstat-l. He made
some good points.

We've just finished the unit on experimental design in my AP Stat
class. I used Moore and McCabe, as well as the Moore BP/stat. We
watched the Against All Odds videos 12, 13 & 14 on the subject and got
lots of good examples from them. We also discussed the survey that Ann
Landers did where 90% of the people responding said they wouldn't have
kids again, and then the infamous Roper question (Thanks to Duane H.)
that garnered the response that 1/3 of Americans have doubts as to
whether the Holocaust happened. There are two topics in Rossman, #11
and #20 that cover experimental design. All in all the kids seemed to
enjoy and grasp the concepts of how to avoid bias in surveys and
experiments. We'll be doing our test on the unit on Monday, so I'll be
able to see better how they did.

The good point of this unit is that they seem to be thinking a little
more and not jumping to conclusions quite so rapidly.

BTW, it was interesting to watch their faces as I presented them with
the statistic that 90% of the people in Lander's voluntary response
survey said they wouldn't have kids again. The play of emotions was
very apparent as they started to question as to whether their parents
might feel that way, and then started to check out where that statistic
came from. They were very relieved to find out that the Gallup poll on
the same subject came up with a very different figure - if I remember
correctly it is 84% of parents _would_ have children again. The release
of emotional tension was quite apparent!

That's one thing that I like about teaching statistics - the issues are
here and now and have an effect on the kids "where they live"!


Louise Hilton
Bingham High School
South Jordan, UT

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