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Topic: Binomial proportion example
Replies: 1   Last Post: Mar 1, 1997 3:10 PM

 Messages: [ Previous | Next ]
 Jerome Reiter Posts: 8 Registered: 12/6/04
Binomial proportion example
Posted: Feb 28, 1997 9:22 PM

Hello all!

I am Jerry Reiter, a 3rd year graduate student in statistics at Harvard
University. I am very interested in the teaching of statistics and in
how the AP statistics exam is taking shape. I am looking forward
to learning about teaching statistics by participating in this group!

A great example for demonstrating hypothesis testing for p-hat is the
following:

Take 20 pennies (20 is arbitrary, just make it a relatively large
number) and stand them up on their edges on a table. Bang the table
with a moderate amount of force. How many pennies do you expect will

It turns out that the tails side of a penny is heavier, so heads comes
up a lot more than 50% of the time! I haven't done it with a large
number of pennies, but I usually get 80% heads or more!

This is a fun example to test againt the null p=0.5. If you have lots
of students doing the example, you will likely find some accepting the
null hypothesis. This will show the variability inherent in hypothesis
testing.

Jerry Reiter

Date Subject Author
2/28/97 Jerome Reiter
3/1/97 Robert Cornell