The document discusses the results of a spirit week survey given to students. It provides the results of 9 multiple choice questions about students' participation in and enjoyment of spirit week events. Some key findings were that lip syncing and decade day were most students' favorite events, while penny wars was the least favorite. Most students reported that spirit week had a slight or average increase on their school spirit. The survey sample consisted of 40 students selected through convenience sampling. The document then discusses concepts related to controlled experiments and blocking in experimental design. It provides an example of how a block design could be used in a drug trial to control for different age groups as a lurking variable. In the example, subjects are divided into blocks based on