下列何种实验设计中，各组样本数可以不等？（）A.自身对照设计B.异体配对设计 C.交叉试验设计D.完全随机设-找考题网

单项选择题This question is divided into four sub-questions. Each question shows an expression used by the shop assistant when asking the customer. The shop assistant informs the customer of a situation, and according to the situation, the shop assistant asks the customer about what kind of service he she needs. Please choose the correct expression that should be filled in after “が…” from the options A-D. ④：喫煙席と禁煙席がございますが… (single-choice question. 1 mark)

下列何种实验设计中，各组样本数可以不等？（ ） A. 自身对照设计 B. 异体配对设计 C. 交叉试验设计 D. 完全随机设计

下列何种实验设计中，各组样本数可以不等？（） A. 自身对照设计 B. 异体配对设计 C. 交叉试验设计 D. 完全随机设计