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Topic: sampling distributions
Replies: 1   Last Post: Nov 18, 1996 12:46 PM

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Chuck Biehl

Posts: 28
Registered: 12/6/04
sampling distributions
Posted: Nov 14, 1996 6:23 AM
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I decided to adopt Schaeffer's _Activity Based Statistics_ as a resource
text for labs, and just did the one called "Spinning Coins" with the kids.
The counterintuitive distribution of % of heads when spinning rather than
tossing was well made by the lab, but I threw in a twist which I thought
you might like. A colleague told me that a 1964D penny was the closest
thing to an honest "loaded" coin because of the extra recessing of
Lincoln's portrait on the heads side, so we found a couple and spun those
for the lab. Sure enough, even though the total distribution had a mean of
39.8% heads (not a surprise; n = 25) the distribution for the '64D had a
mean of _29%_! (n = 20) I thought this was pretty cool, and would like to
do some tossing with the same coin to see what happens. Anybody have any
experience with this?

L. Charles (Chuck) Biehl
The Charter School of Wilmington
Wilmington, DE 19807
(v)302.651.2727 (f)302.652.1246

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