题干

某公司在2014年上半年的收入x(单位:万元)与月支出y(单位:万元)的统计资料如下表所示:

月份

1月份

2月份

3月份

4月份

5月份

6月份

收入x

12.3

14.5

15.0

17.0

19.8

20.6

支出Y

5.63

5.75

5.82

5.89

6.11

6.18

根据统计资料,则(  )

A:月收入的中位数是15,x与y有正线性相关关系

B:月收入的中位数是17,x与y有负线性相关关系

C:月收入的中位数是16,x与y有正线性相关关系

D:月收入的中位数是16,x与y有负线性相关关系

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答案(点此获取答案解析)

C

同类题2

根据短文内容,选择适当的单词或短语填空, 使短文意思完整, 每个选项使用一次。

A. show me the building,    B. was rising ,   C. make a living,   D. could hardly sleep   E. took my taxi  F. pay you  
G. drive through downtown,      H. don't have any family left

    Twenty years ago, I drove a taxi for a living. One time in the middle of the night, an old lady in her 80s ____ . She gave me an address, and then asked, “Could you ____?”

    “It's not the shortest way,” I answered quietly .

    “Oh, I don't mind,” she said. “I'm in no hurry. I'm on my way to a hospice(临终医院). I ____ The doctor says I don't have very long.”

   I quickly reached over and shut off the meter(计价器). For the next two hours, we drove through the city. She____where she had once worked, the neighborhood where she had lived, the place where she danced as a girl. As sun ____, we got to the hospice.

    “How much should I ____?” she asked, reaching into her purse.

    “Nothing ” I said.

    “You have to____ ” she answered.

    “Oh, there are other passengers,” I answered.

    “You gave an old woman some moment of happiness”. She said: “Thank you.”

    I drove into the fine morning light. Behind me, a door shut. It was the sound of closing of a life. I drove aimlessly, lost in thought.  For the rest of the day, I ____. What if that woman had got an unfriendly drive, or one who was impatient to his shift? What if I had refused to take the run?