TABLE 11-6
An agronomist wants to compare the crop yield of 3 varieties of chickpea seeds. She plants all 3 varieties of the seeds on each of 5 different patches of fields. She then measures the crop yield in bushels per acre. Treating this as a randomized block design, the results are presented in the table that follows. 
-Referring to Table 11-6, what is the null hypothesis for testing the block effects?
Definitions:
Tolerance
The process by which the body's response to a drug or substance decreases over time, requiring more of it to achieve the same effect.
Reinforcer
An stimulus that, when presented after a behavior, increases the likelihood of that behavior occurring again.
Pain Behavior
Observable actions and expressions indicating pain and suffering, which can include verbal complaints, grimacing, limping, or other physical signs.
Monetary Compensation
Financial payment received by an individual or group for services rendered or as a recompense for losses suffered.
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