tahirawan11
Involved In Discussions
Hi,
I would like to compare two ‘calibration techniques’. We have an ultrasonic tester which is used to detect defects in the product. Before we start testing we need to calibrate the instrument. The instrument is calibrated by testing the ‘Reference plate’, We know the ‘true defects’ (true value) of the reference plate and we adjust ‘two parameters’ in the ultrasonic machine until we see the ‘true defects’, once the defects are visible in the tester, we say the instrument is calibrated and ready to use. The two ‘calibration techniques’ differs from each other on the basis of 'sound frequencies'. The technique A uses 2dB and technique B uses 0.5dB. Here are the results (three columns, sorry for bad formatting) The technique which has less variance will be better one, Can any one suggest if I can perform a statistical analysis, to say which is better than the others, such as ANOVA.
Tech P_A P_ B
1 0 7
1 1 7
1 1 8
1 1 7
1 1 7
1 1 7
1 1 7
1 1 7
1 1 7
1 1 7
2 2 9
2 2 8
2 4 8
2 2 8
2 2 8
2 2 8
2 2 8
2 2 8
2 2 8
2 2 8
where Tech=techinque nr, P_A=parameter A and P_B=parameter B
/thanks in advance
I would like to compare two ‘calibration techniques’. We have an ultrasonic tester which is used to detect defects in the product. Before we start testing we need to calibrate the instrument. The instrument is calibrated by testing the ‘Reference plate’, We know the ‘true defects’ (true value) of the reference plate and we adjust ‘two parameters’ in the ultrasonic machine until we see the ‘true defects’, once the defects are visible in the tester, we say the instrument is calibrated and ready to use. The two ‘calibration techniques’ differs from each other on the basis of 'sound frequencies'. The technique A uses 2dB and technique B uses 0.5dB. Here are the results (three columns, sorry for bad formatting) The technique which has less variance will be better one, Can any one suggest if I can perform a statistical analysis, to say which is better than the others, such as ANOVA.
Tech P_A P_ B
1 0 7
1 1 7
1 1 8
1 1 7
1 1 7
1 1 7
1 1 7
1 1 7
1 1 7
1 1 7
2 2 9
2 2 8
2 4 8
2 2 8
2 2 8
2 2 8
2 2 8
2 2 8
2 2 8
2 2 8
where Tech=techinque nr, P_A=parameter A and P_B=parameter B
/thanks in advance
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