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Re: [ap-stat] Sampling methods on the AP test/Methods of simulation
Posted:
Nov 7, 2009 10:50 AM
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Eric,
1) I hae no idea what to say for your #1. After the esteemed Chris
Olsen said that if the 100 were randomly mixed
prior to choosing, then the systematic would then be an SRS. Still
processing that one.
2) This I thionk I can handle. The times that students have been asked
to do a simulation on the AP Exam, it
had to be done on the Random Digit Table. Otherwise, how would readers
know if their calculator simulation was
done correctly? Also, by doing simulation with the RDT, I think the
kids can easily transfer the idea to a simulation
on the calculator because they have learned the basics. I find that if
I just tell kids what keys to punch on the TI,
they are concentrating on finding those keys and not on what we are
really doing.
Sally Miller
Klein, Eric wrote:
> Two questions:
>
> 1) A problem asks for a sample of size n=5 from a population of N=100. On the AP test, must the students use an SRS, or may they instead elect to use a systematic random sample by randomly selecting a first value and adding 20 to it four times to collect the remainder of the units in the sample? Is there a hazard in choosing this second method?
>
> 2) Simulation by table seems cumbersome and antiquated in the age of the TI-84. How much should I stress the table vs. the calculator?
>
> Eric Klein
> Mathematics and Statistics instructor
> Andover high School
> Bloomfield Hills, MI.
> Frequently asked questions (FAQ) http://www.mrderksen.com/faq.htm
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Sally Miller
T. C. Williams High School
Alexandria, VA
Frequently asked questions (FAQ) http://www.mrderksen.com/faq.htm
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