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David
Posts:
4
Registered:
6/15/12


compare two methods for measuring concentration
Posted:
Jul 16, 2012 10:10 AM


Hi, I have an experiment where I have a goldstandard method to calculate the concentration of a sample and two methods I want to test how well they measure the concentration and if one of them is better than the other. I have set up a concentration gradient from 0 to 5 units in breaks of 0.5 and measure each sample with each new method. I have done an ANOVA test on the measurements obtained for each method and have found that measurements are statisticaly different between the two methods. Then I have run a linear regression on each method to see how each method fits the gradient, and I see that one of the two methods has a higher Rsquared value. My question is, can I say based on R or Rsquare values that one of the methods is significantly better than the other at measuring concentration based on both the Rsquare value and the significance of the ANOVA test?
Thanks,
Dave



