% area under normal curve vs sigma
Message posted by Matthew (via 208.222.192.2) on July 6, 2001 at 3:45 PM (ET)

I have seen figures for 1-3 standard deviations from median for normal curve, and I would like to do two things:

1. determine the % area under the curve for sigma= 4,5,6
2. understand how these were calculated.

E.g The following have been given in various texts:
1 sigma = 68.2%
2 sigma = 95.5%
3 sigma = 99.7%

How are these calculated, and what are the full precisions for them and sigma up to 6?

Regards
Matthew

READERS RESPOND:
(In chronological order. Most recent at the bottom.)

correction: % area under normal curve vs sigma
Message posted by matthew (via 208.222.192.2) on July 6, 2001 at 5:19 PM (ET)