title: An investigation of the distribution of the protein content of samples of corn, meat and bone meal, and soybean meal.
abstract: This study examines the critical assumption of a normal distribution for protein content in feedstuffs. Data were collected from broiler feed mills on the nutrient content of corn, meat and bone meal, and soybean meal. Tests of normality for protein within each feedstuff were performed by each of two methods: 1) the Shapiro-Wilk test (n < 50) or Kolmogorov-Smirnov test (n > 50); and 2) the D'Agostino-Pearson K2 test. Results indicate that protein is non-normally distributed in corn and in meat and bone meal, but protein is normally distributed in soybean meal.
authors.affiliation: Department of Agricultural and Applied Economics, University of Georgia, Athens 30602.
authors.forename: S R
authors.initials: SR
authors.lastname: Kirby
authors.forename: G M
authors.initials: GM
authors.lastname: Pesti
authors.forename: J H
authors.initials: JH
authors.lastname: Dorfman
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D001688:Biological Products; D002645:Chickens; D004044:Dietary Proteins / Q000032:analysis*; D008903:Minerals / Q000737:chemistry*; D016011:Normal Distribution; D013025:Glycine max / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D001688:Biological Products; D004044:Dietary Proteins; D008903:Minerals; C027762:bone meal