The Total Variation in Response, Assuming No Bias, Is Due

Multiple Choice

The total variation in response, assuming no bias, is due to error (unexplained variation) plus differences due to treatments (known variation) . If known variation is large compared to unknown variation, which of the following conclusions can be drawn?

A) There is no difference in response due to treatments.
B) There is a difference in response due to treatments.
C) The treatments are not comparable.
D) The cause of the response is due to something other than treatments.