问题
多项选择题
描述数据分布集中趋势的有（）。
A.算术平均数
B.中位数
C.极差
D.标准偏差
答案
参考答案：A, B
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描述数据分布集中趋势的有（）。
A.算术平均数
B.中位数
C.极差
D.标准偏差
参考答案：A, B
| 阅读短文，根据短文内容，从短文的五个选项中选出能填入空白处的最佳选项。 有一个选项为多 余选项。 | |
| A funny thing happened to my sister Tina last month. She lives in Japan and teaches English. In Japan, people don't usually wear their outdoor shoes in the house or in school, and a lot of buildings have places for shoes. So her school has a special place for shoes. 1. Tina teaches English in the evening. One Friday, she went to school, and she put her shoes in the shoe box-as usual. Then she had an interesting spoken English class with her students. 2. But to her surprise, her shoes weren't in the box. There was only one pair of those there, and they weren't her hoes! She had to get home in a hurry. 3. On Monday, at her next English class, her shoes were in a shopping bag on her desk! There was a note that said, "I'm so sorry. I took your shoes by mistake!" 4. Somebody felt a lot of shame!
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