On 26 Feb 2004 15:56:41 -0800, in sci.stat.edu [EMAIL PROTECTED] (Dennis Roberts) wrote:
>A key "may be" in the minting process ... I heard once at a conference >where a demo was done .. lining up coins on edge and pounding the table ... >that the p is not 50/50 for H and T to land face up ... that there is a >slight bevel to the edge (not noticeable by eye) that makes ejecting from a >mold easier The bias for "tipping" coins like that is very noticeable. I do an experiment on that in my intro stats course most years. As long as the table is flat, and you don't hit it too hard, the probability of H is around 0.4 with Canadian pennies. (This year's data was 130 H in 345 tips.) Duncan Murdoch . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
