Warren We have had some success with a sort of hypothesis test in this regard. I had a task some years back to prove that the first area mined in a deposit was not significantly lower than could be expected by chance selection.
We used a combination between 'between block variance' and a sort of cutoff analysis. It helps if your samples have a simple distribution like Normal or lognormal. Basically, you work out the probability that a block of a certain size would have a value that low (in our case). It is, effectively, a simple application of volume/variance. Chapter 3 in my 'old' book which can be read (or downloaded) at http://uk.geocities.com/practica.htm Isobel ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html -- * To post a message to the list, send it to [EMAIL PROTECTED] * As a general service to the users, please remember to post a summary of any useful responses to your questions. * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list * Support to the list is provided at http://www.ai-geostats.org
