1. Graduate assistant and professor of Food Science, respectively, 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.