Use this scenario to answer the next three questions.

r. a. fisher, a famous statistician, describes a well-known design in his book, design of experiments. five varieties of wheat were compared to determine which gave the highest yield in bushels per acre. eight farms were available for planting. each farm was divided into five plots. for each farm, the five varieties were randomly assigned to the five plots with one variety per plot. the varieties were planted on their assigned plots and their yields were measured and compared.

what type of study is this?