Hello,
this is from nolinks://en.wikipedia.org/wiki/Casino_game: (nolinks://en.wikipedia.org/wiki/Casino_game:)
SD (Roulette, even-money bet) = 2b sqrt(npq ), where b = flat bet per round, n = number of rounds, p = 18/38, and q
= 20/38.
For example, after 10 rounds at 1 unit per round, the standard deviation will be 2 x 1 x sqrt(10 x 18/38 x 20/38) = 3.16 units.
A: 3.16 is how many standard deviations?
B: Someone understand how construct this, please: 2b sqrt(npq ) ???
Thank you, SYNAX