RE: AI-GEOSTATS: Skewed Distributions

[bob sandefur]

Yes-   Take a gold deposit with 99% of assays 0 gpt,  1% of assays 1 gpt. Mean is 0.01, prob 1 assay < mean =99% Extreme case but true for lognormal as well.   Robert (Bob) L. Sandefur PE Senior Geostatistician / Reserve Analyst CAM 200 Union Suite 430 Lakewood, Co 80228 [EMAIL PROTECTED] 303 472-3240 (cell) <-best choice 303 716-1617 ext 14 The content of this message may contain the private views and opinions of the sender and does not constitute a formal view and/or opinion of the company unless specifically stated. The contents of this email and any attachments may contain confidential and/or proprietary information, and is intended only for the person/entity to whom it was originally addressed. Any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this email in error please notify the sender immediately by return e-mail and delete this message and any attachments from your system.       From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Digby Millikan Sent: Friday, May 19, 2006 07:44 To: AI Geostats mailing list Subject: AI-GEOSTATS: Skewed Distributions   Is it correct that the probability of being above or below the mean of a skewed distribution is not necessarily 0.5?