Preliminary Box Plots for OLS, IV, and Corrected IV
The data is consistent with the 1988 DMHMRSAS data used in
Holt, Merwin and Stern and reported kappa
statistics in the literature. A covariance matrix adjustment factor of
0.05 is used throughout. Each group of three is for a different
measurement error generating
process with increasing measurement error as one moves to the right.
The box plots represent the median and the end points of the symmetric
80% confidence interval.