An experiment is to be carried out to determine the optimal
combination of microwave oven
settings for microwave popcorn. Cooking time has three possible
settings (3,4, and 5 minutes)
and cooking power has two settings (low power, high power). The
response (to be minimized)
is the number of burned plus the number of unpopped kernels.
a. Identify the experimental unit.
b. Identify the experimental factor(s), levels, and any
factor-level combinations if present