List and explain the three reasons the aggregatedemand curve is downward sloping.

Bnad277: Chapter 13b Notes Experimental Design and Analysis of Variance - Randomized Block Design o Experimental units are the objects of interest in the experiment. o A completely randomized design is an experimental design in which the treatments are randomly assigned to the experimental units. o If the experimental units are heterogeneous, blocking can be used to form homogeneous groups, resulting in a randomized block design. o ANOVA Procedure: ▯ For a randomized block design the sum of squares total (SST) is partitioned into three groups: sum of squares due to treatments, sum of squares due to blocks, and sum of squares due to error.