Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.



sampling distributions
Posted:
Nov 14, 1996 6:23 AM


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 http://dimacs.rutgers.edu/~biehl



