A marketing research firm wants to know whether information presented in a commercial is better recalled when presented using humor or serious commentary by adults between 18 and 35 years of age. They will use an exam that asks questions of 50 subjects about information presented in the ad. The response variable will be percentage of information recalled.
(a) Create a completely randomized design to answer the question. Be sure to include a diagram to illustrate your design.
(b) The chief of advertising criticizes your design because she knows that women react differently from men to advertising. Redesign the experiment as a randomized block design assuming that 30 of the subjects in your study are female and the remaining 20 are male. Be sure to include a diagram to illustrate your design.