配对设计是将受试对象按某些特征或条件配成对子，再将每对中两个受试对象随机分配到两个不同处理组中。配对的因素看做是影响实验效应的非处理因素，因此，本设计仍属单因素试验设计。比如，在动物实验中，常将种系、窝别、性别相同、年龄、体重相近的两个动物配成对子；... Paired design is the test subjects according to certain characteristics or conditions paired, and then two subjects in each pair randomly assigned to two different treatment groups. Pairing factors are considered as non-processing factors that affect the experimental effect, therefore, the design is still a single factor experiment design. For example, in animal experiments, two animals that are similar in germline, fossil, gender, age, and weight are often paired with each other; ...