The document describes different research experiment designs including:
1) An after-only design with a control group to test the effect of a new shampoo sample on sales.
2) A before-after design to test the effect of new packaging on an existing product's sales.
3) A before-after design with a control group to more rigorously test the effect of new packaging while controlling for other factors.
4) An after-only design with a control group to test the effect of print advertisements on brand awareness.
5) A Latin square design to test the effect of different window displays on foot traffic to various stores.