第26题: [单项选择]我国人群HBsAg阳性率平。均为10%,某地随机抽查了100人,其中HBsAg阳性20人。 欲回答该地阳性率是否高于我国平均阳性率,应作何种统计处理 A. 配对χ2检验 B. 成组χ2检验 C. 样本率与总体率比较的正态近似法 D. 两样本率比较的Z检验 E. Fisher确切概率法 参考答案:C
第37题: [单项选择]What is the man’s profession A. He uses a newer machine. B. His job is now done by a machine. C. He went on strike. D. His job was given to another worker. 参考答案:B 答案解析:[听力原文] W: I just heard the bad news about your job. M: Well, the company is automating the off