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BGonline.org Forums
Meyer Dice Tube
Posted By: Brett Meyer In Response To: Meyer Dice Tube (christian munk-christensen)
Date: Thursday, 12 August 2010, at 11:25 p.m.
As stated on my website (under the "Product History" tab), I have been testing and developing this product since 2005. Since settling on a round tube with the current product dimensions, multiple trials have been conducted to test the randomness generated. In January, 2009, my wife and I spent several days recording data from a trial of 3,000 flips using a tube WITH NO RODS containing two 9/16" precision dice. Even with NO rods installed, randomness was achieved! (Doubles resulted 16.63% with an average pip of 8.171)
Regarding the data from the 3,000-flips trial, we did much more than average the pips/roll and calculate the % of doubles rolled. We also tracked both dice (different colors) separately, to look for any patterns that deviate from 6-sided-cube probabilities.
Here is a specific example from the data collected: Of the 3,000 flips, the red die began the flip showing a [1] 491 times. The results of those 491 red 1's were: 1: 80 times 2: 79 times 3: 84 times 4: 81 times 5: 85 times 6: 82 times
How is this possible with no rods to tumble or spin the dice?? When the tube is "flipped", the dice begin the randomization process immediately by rotating or spinning due to the inertia of the flip itself. Then, they must fall the length of the tube (~9"). This fall is not straight down the tube. Because of the kinetic energy imposed on the dice during the flip, they are contacting each other as well as the tube's interior wall as they fall. Furthermore, once they hit the velcro pad at the bottom of the tube, they bounce, spin, rotate, and eventually settle to a stop. So, if randomness is achieved without any rods installed, why install rods in the tube? The answer is simple...to eliminate any potential suspicion of randomness not being achieved using this device.
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