Strain is to be measured remotely in a structure by means of a strain gage. To estimate the total uncertainty in the measurement of strain, the strain gage and the transmission line are tested...

Strain is to be measured remotely in a structure by means of a strain gage. To estimate the total uncertainty in the measurement of strain, the strain gage and the transmission line are tested separately. Ten measurements of the strain gage output under the same loading produce a standard deviation of 0.8 mV in an average output of 100 mV. Ten measurements of the transmitted voltage produced a standard deviation of 1 mV. Determine the random uncertainty of the voltage measurement of strain produced by the strain gage at a 95% confidence level.