Estelle's cornfield is divided into 6 regions. She wants to know if a new pesticide is as effective as the pesticide that she currently uses. She randomly assigns each of the 6 regions to either the new or current
pesticide for a month, and she'll compare the effectiveness of the pesticides.
What type of experiment design is this?
A. a randomized block design where the 6 regions are the blocks.
B. a matched pair design with the new pesticides and current pesticides as the pairs.
C. A randomized block design where the pesticides are the blocks.
D. A completely randomized design.
E. A systematic cluster design.