01 Jun '09 16:08>
Originally posted by KellyJayPrecisely (pun intended).
It would depend on the equipment being used.
Kelly
Every measurement...hold on and read that again...every measurement made by anyone, anywhere, at any time!!! includes a standard error. The question is, is that standard error enough to make the measurement useless for the particular application?
Your examples are a little confused. Voltage drops are things that you measure using a piece of equipment, not measurements or measuring instruments themselves. Same with signals. The error associated with the measurement of these phenomena depends on the type of equipment used. A yardstick is an actual measurement device, but as you should recall from high school, the standard error for a yard stick is 1/2 of the smallest gradation. If your yardstick measures things in 1/8ths of an inch, then any measurement you make will have a standard error of +/- 1/16th of an inch. No big deal for measuring a yard of wood, but quite a big deal for measuring the radius of a standard ball bearing. Are yardsticks now unreliable?
Dendrochronology also includes a standard error of about 0.5% of the total measurement, with a measurement range of about 12,000 years possible based on the samples discussed. That's about 12,000 years +/- 60 years. Please check out this website for details:
http://www.evcforum.net/cgi-bin/dm.cgi?action=msg&f=25&t=2612&m=1
http://www.ncdc.noaa.gov/paleo/slides/slideset/index18.htm (this is a great slide show that explains how false rings and missing rings are dealt with, linked from the page noted above)
Just to let you know, this level of precision is quite good. Drawing an analogy to the yardstick, dendrochronology probably wouldn't be a useful method for dating wood harvested within the past 10 years. However, it is a very good method for dating much older wood objects. If you answered "no" to the question of the yardstick's reliability above, how could you answer "yes" to the question of dendrochronology's reliability?
Please, don't answer without reading the material linked above, and don't answer without addressing any inconsistencies you find in the information posted there.
Please and thank you.