An agricultural engjneer is trying to develop a piece of equipotent for processing a crop immediately after harvesting. Two configurations of this equipment are to be compared. Twenty runs are to be performed over = period of 5 days. Each run involves setting up the equipment in either configuration I or configuration II, harvesting a given amount of crop processing it on the equipment. obtaining a quantitative measure of performance, and then cleaning the equipment. Since there is only one piece of equipment, the tests must be done one at a time. The engineer has asked you to consult on this problem.
(a) What questions would you ask her?
(b) What advice might you give about planning the ·experiment?
(c) The engineer believes the most accurate experiment requires that an equal number of runs be conducted with each configuration. What assumptions would make it possible to demonstrate· in a quantitative way that this is true.