Feed Time Research

A producer of various feed additives for cattle conducts research on the number of days of feed time (TIME) required to bring beef cattle to market weight. Eighteen steers of essentially identical age and weight are purchased and brought to a feedlot. Each steer is fed a diet with a specific combination of protein content in percentage points (PROTEIN), antibiotics (ANTIBIO: 0=not mixed, 1=mixed), and percentage of feed supplement (SUPPLEM).