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Gold/Mining/Energy : Winspear Resources -- Ignore unavailable to you. Want to Upgrade?

To: maintenance who wrote (13053)	1/21/1999 9:27:00 PM
From: marcos	Read Replies (1) \| Respond to of 26850

What's a 'confidence interval', maintenance? ... btw, those posts of yours on Trump 12 are great, I've seen this stuff worked out before but never saw the method so clearly explained - #reply-7337291 #reply-7366048 #reply-7369708 ...... thanks Cammo - it's Québec -g-

To: maintenance who wrote (13053)	1/21/1999 9:55:00 PM
From: Chad Barrett	Read Replies (1) \| Respond to of 26850

<< Hi I see your a math major. Can you calculate a confidence interval for the mini bulk sample? Or even better can you calculate the confidence interval of the 6000 ton sample if we assume a resource of greater than 10 or 20 million tons grading as per MRDI study? Can we tell anything of size distribution? >> Jeeze man! You trying to actually make me use the stuff I'm learning? LOL At this point I don't believe we have sampled enough to get a decent statistical result. However, I will try to find some time to crunch a few numbers and I'll let you know if I find anything of interest. I think there are 2 things we should be interested in statistically. First, is how much material we should sample to be able to accurately predict the grade of the entire dyke. (assumptions would have to be made to do such a calculation) Also, comparing results from each drill hole would help to determine if the diamond distribution is "uniform" throughout the dyke. It should be noted that MANY drill holes would likely be required to draw statistically significant conclusions. However, only by crunching the actual numbers can I conclusively make any comments on that. It is fairly important to be able to say that the dyke has a fairly uniform diamond population so that we can draw conclusions about the entire dyke from the samples we have. (ie. uniform diamond distribution makes it easier to draw a conclusion about a large population because a smaller sample size is needed to reach the desired confidence interval - usually 95%) Chad