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Hello all
First time on the Math side of this great Forum.
I need to do a correlation study.
There are 3 methods to measure Form Error of a round metal part.
Previous observations between the three methods have variacen of ½ to 1 micron.I am seeking a very strong correlation coefficent and high confidence level.
What would be a good sample size?
Thank you
First time on the Math side of this great Forum.
I need to do a correlation study.
There are 3 methods to measure Form Error of a round metal part.
- The base line is the traditional measuring method that is laborious but of the highest accuracy.
- A cnc machine measurement machine takes data with an analog tactile scan probe
- Lastly, a very sophisticated digiatal tactile scan probe.
Previous observations between the three methods have variacen of ½ to 1 micron.I am seeking a very strong correlation coefficent and high confidence level.
What would be a good sample size?
Thank you