The Elsmar Cove Forum MU - Type B estimation - Which distribution to use? Triangle? Rectangular?
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#1
30th March 2005, 09:17 PM
 wcsf - 2008 E-Mails Invalid or Rejected by Recipient System   Registration Date: Sep 2002 Location: KL Posts: 26 Thanks Given to Others: 0 Thanked 0 Times in 0 Posts Karma Power: 0 Karma: 10
MU - Type B estimation - Which distribution to use? Triangle? Rectangular?

When we use Type B estimation, there are different distribution such as triangle, rectangular...etc. Could anyone pls advice how to choose which distribution to use?? Thx.

#2
30th March 2005, 11:17 PM
 Hershal Metrologist-Auditor   Registration Date: Mar 2004 Location: So Cal, California, U.S. Age: 57 Posts: 2,100 Thanks Given to Others: 1 Thanked 625 Times in 444 Posts Karma Power: 265 Karma: 8599
For Type B, most of the time you can ignore triangle. That is not the textbook answer but is reality.

Usually, you only need to concentrate on normal or rectangular. If you have uncertainties from an outside cal, divide them by two and plug the number in. For resolution error, the conservative route is to take one half of the least resolution of the instument.

Hope this helps.

Hershal
#3
24th April 2005, 03:39 PM
 lhiga Inactive Registered Visitor   Registration Date: Apr 2002 Location: Hawaii Posts: 9 Thanks Given to Others: 0 Thanked 0 Times in 0 Posts Karma Power: 46 Karma: 10
I just use the rectangular distribution (for all analysis) because the rectangular is the most conservative.
#4
6th May 2005, 09:20 AM
 Daryl Montie Inactive Registered Visitor   Registration Date: Apr 2005 Location: Atlanta, GA Posts: 9 Thanks Given to Others: 0 Thanked 0 Times in 0 Posts Karma Power: 33 Karma: 10
Here's a great link to show the different types of MU distributions and when to apply each. Very helpful.

http://www.hn-metrology.com/distrib.htm

Daryl Montie

 The Elsmar Cove Forum MU - Type B estimation - Which distribution to use? Triangle? Rectangular?

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