Does an addn'l simple calculation on a random number alter randomness?
April 18, 2013 7:24 AM Subscribe
Does an additional, simple calculation (add one, for instance) of a genuinely random number, if applied to all results, affect the integrity of the result's randomness?
posted by Quarter Pincher to Science & Nature (33 answers total) 1 user marked this as a favorite
Would a tacked-on calculation that consistently modifies a genuinely-random number, alter the randomness of the number?
Example 1: If it is agreed by all parties present to whom the roll would matter, that a 1d6 die creates sufficiently random results, would the rolling of a standard 1d6 die and then adding "1" to the result (whereas a 6 would become 1), affect the randomness of the result unmodified 1d6 roll?
Example 2: If it is agreed by all parties present to whom the roll would matter, that a coin flip creates a sufficiently random result, would the flipping of a coin and catching it in an upturned palm, but then flipping the palm over onto the back of the catcher's other hand (making a palm-result heads into tails, or tails to heads) affect the randomness of the result, compared to the randomness of the palm-caught result?