Re: precision of a measurement (documentation related question)
- To: mathgroup at smc.vnet.net
- Subject: [mg61604] Re: precision of a measurement (documentation related question)
- From: Chris Chiasson <chris.chiasson at gmail.com>
- Date: Sun, 23 Oct 2005 05:46:15 -0400 (EDT)
- References: <acbec1a40510221346r2cee06c3led071a9eeb92d58b@mail.gmail.com>
- Sender: owner-wri-mathgroup at wolfram.com
Thanks to a Mention by Maxim in this thread: http://groups.google.com/group/comp.soft-sys.math.mathematica/browse_frm/thread/1768e67ba5ac75f3?tvc=1&q=interval+significance and the documentation for Interval, I was able to figure out the answer to my question: FullForm@Interval[SetPrecision[x,-Log[10,dx/x]]]/.{{x\[Rule]30, dx\[Rule]0.5},{x\[Rule]30,dx\[Rule]1} On 10/22/05, Chris Chiasson <chris.chiasson at gmail.com> wrote: > Hi Mathgroup, > If I know that a number (say in inches, measured on a ruler that only > has marks for inches) and its error are: > 30 + or - 0.5, > then looking at the help file for Precision, I see that the precision is: > -Log[10,dx/x] > In this case, is dx = 0.5 or is it equal to 1.0?? > I have noticed that in either case, the number of significant > digits/the precision is less than 2. > > Your thoughts? > -- > Chris Chiasson > http://chrischiasson.com/contact/chris_chiasson > -- Chris Chiasson http://chrischiasson.com/contact/chris_chiasson