This study compares the three parametric statistical methods: coefficient of variation, Pearson correlation coefficient, and F-test to obtain reliability in a Delphi study that involved more than 100 participants. The results of this study indicated that coefficient of variation was the best procedure to obtain reliability in such a study.
Shah, Hiral A. and Kalaian, Sema A.
"Which Is the Best Parametric Statistical Method For Analyzing Delphi Data?,"
Journal of Modern Applied Statistical Methods: Vol. 8
, Article 20.
Available at: http://digitalcommons.wayne.edu/jmasm/vol8/iss1/20