funsec mailing list archives
Re: Im lovin google spam filter
From: Valdis.Kletnieks () vt edu
Date: Thu, 07 Apr 2011 13:11:16 -0400
On Thu, 07 Apr 2011 12:49:34 EDT, michael.blanchard () emc com said:
If we take 100 people on this list, have them all look in their backyards and report if there is any paper or plastic blowing around, I'll bet we can come up with a fairly high percentage of us that don't have any paper or plastic blowing around. I'll further say that I'll bet the number would be within a standard deviation of 4% error. So, if 96% of us don't have any paper or plastic blowing around in our yards, could we safely say that no-one litters?
No, you can safely say that the population average of litter-free backyards is has a 70% chance between 92% and 100%, and about 95% chance of being between 88% and 100%. (Yes, it's likely to be closer to a chi-squared curve than a gaussian bell curve due to the constraint of one tail). The problem is that careful analysis is needed - I'll make a prediction that yards with chain link fences have a lot higher level of wind-born litter than unfenced yards. This of course impacts your analysis of litter sources. And incidentally, Rick *has* done the "take 100 people" type analysis, which is why he commented that (basically) the plural of anecdote isn't data.
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Current thread:
- Im lovin google spam filter RandallM (Apr 05)
- Re: Im lovin google spam filter Rich Kulawiec (Apr 07)
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- Re: Im lovin google spam filter Alex Eckelberry (Apr 07)
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- Re: Im lovin google spam filter Rich Kulawiec (Apr 07)
- Re: Im lovin google spam filter michael.blanchard (Apr 07)
- Re: Im lovin google spam filter Valdis . Kletnieks (Apr 07)
- Re: Im lovin google spam filter michael.blanchard (Apr 07)
- Re: Im lovin google spam filter Valdis . Kletnieks (Apr 07)
- Re: Im lovin google spam filter michael.blanchard (Apr 07)
- Re: Im lovin google spam filter Alex Eckelberry (Apr 07)
- Re: Im lovin google spam filter Hubbard, Dan (Apr 07)
- Re: Im lovin google spam filter Valdis . Kletnieks (Apr 07)
- Re: Im lovin google spam filter rsk () gsp org (Apr 08)
- Re: Im lovin google spam filter Joel Esler (Apr 08)
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- Re: Im lovin google spam filter Alex Eckelberry (Apr 06)