The problem with your test is you had only two iterations. The standard deviation is the square of the difference with the mean devided by 2 in your case and that taken to square root. I calculated with your values and it fits fine: 1.9325
The median in your case does not make any sense because you only used two values; the median is just the middle value, like 5 in the series of 1 - 2 - 5 - 50 - 200.
[This message has been edited by Mercury (edited 03-22-2002).]