1. Graduate assistant, professor and department head, professor, and former graduate assistant, respectively, Department of Food Science, 272 Young Ave., University of Arkansas, Fayetteville, AR 72704.
2. Corresponding author. E-mail: tsiebenm@comp.uark.edu Phone: 501-575-2841. Fax: 501-575-6936.
3. Associate professor, Agricultural Statistics Laboratory, University of Arkansas, Fayetteville, AR 72701.