# Simple to test Cliff

October 29, 2008

Posted By Kent McMillan on 10/28/2008 at 7:06 PM

Cliff:

It is simple enough to test to derive the standard error of a direction angle taken as the mean of both faces. In your situation, A standard error of +/-1.0" for directions taken (mean of F Lt and F Rt) with the lesser quality Wild T-2 means that you'd expect the angles to have standard errors of about +/-1.4" unless the Wild instruments are much worse than the Zeiss one-second theodolites.

What does analysis of variance in your observations give you for a standard error?

Best regards,

Kent McMillan, RPLS Austin TX

To read the rest of this thread go to www.i-boards.com/bnp/pob/messages.asp?MsgID=1303517&ThreadID=124228&IsResponse=False#1303517

Cliff:

It is simple enough to test to derive the standard error of a direction angle taken as the mean of both faces. In your situation, A standard error of +/-1.0" for directions taken (mean of F Lt and F Rt) with the lesser quality Wild T-2 means that you'd expect the angles to have standard errors of about +/-1.4" unless the Wild instruments are much worse than the Zeiss one-second theodolites.

What does analysis of variance in your observations give you for a standard error?

Best regards,

Kent McMillan, RPLS Austin TX

To read the rest of this thread go to www.i-boards.com/bnp/pob/messages.asp?MsgID=1303517&ThreadID=124228&IsResponse=False#1303517