ABSTRACT
Several authors, for example, Bhapkar and K o c h (1968), have
emphasized the difference between factor or explanatory variables
which classify the unit of observation according to a description of
the sub-populat ion of the units to which it belongs (or to the
experimental condit ions which it undergoes), and response variables
which classify according to a description of what happens to the
unit dur ing and/or after the experiment. The data in Table 5.5, for
example, has essentially one response and two factor variables, the
former being the state of the plant after the experiment, alive or
dead, and the latter being time of planting and length of cutting. In
any analysis of such data, the primary interest generally lies i n
assessing how the factor variables affect the response variable.
