Identify the design. Identity design means identifying the number of design factors and the randomization procedure used. For example, one-factor factorial experiment for CRD, split-plot design with one (two, three) factors, nested design, etc.

A company buys raw material from three different suppliers. They want to know if raw material purity is dependent on the supplier. Three batches of raw material are selected at random from each of the suppliers. Three independent measures of purity are made on each batch of raw material. The company is interested not only in the supplier(s) with the highest purity of raw material, but also in small batch-to-batch variability of purity of the product. The purity readings were recorded but not provided here