问题
单项选择题 A2型题
8例某病患者的潜伏期（天）如下：2、3、3、3、4、5、6、30，则平均潜伏期是（）
A.均数为3天
B.均数为7天，其很好地代表了大多数病人的潜伏期
C.中位数为3天
D.中位数为4天
E.中位数为3.5天，中位数不受个别病人潜伏期长的影响
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
8例某病患者的潜伏期（天）如下：2、3、3、3、4、5、6、30，则平均潜伏期是（）
A.均数为3天
B.均数为7天，其很好地代表了大多数病人的潜伏期
C.中位数为3天
D.中位数为4天
E.中位数为3.5天，中位数不受个别病人潜伏期长的影响
参考答案：E
阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话。
B: 1 ? A: For your daughter? Look, the shoes are really nice. Do you like them? B: Yes. But I’m afraid my daughter doesn’t like the color. 2 ? A: Sure. There are different kinds of shoes over there. What color does she love? B: 3 And black is her favorite color. A: What size of shoes does she wear? Angela: Size 9. Let me see. Um, this pair of shoes must fit her. 4 ? A: They are not expensive, Only 199 Yuan. B: That would be OK. 5 . Here is the money. A: Thank you very much. B: That’s all right. |