问题
填空题
在3.5,8.2,4.6,3.8,4.2这5个数中,中位数是______,平均数是______.
答案
(1)把这组数据按从小到大的顺序排列:
3.5,3.8,4.2,4.6,8.2,
根据中位数的求法,所以中位数是4.2;
(2)平均数:(3.5+8.2+4.6+3.8+4.2)÷5,
=24.3÷5,
=4.86;
故答案为:4.2,4.86.
在3.5,8.2,4.6,3.8,4.2这5个数中,中位数是______,平均数是______.
(1)把这组数据按从小到大的顺序排列:
3.5,3.8,4.2,4.6,8.2,
根据中位数的求法,所以中位数是4.2;
(2)平均数:(3.5+8.2+4.6+3.8+4.2)÷5,
=24.3÷5,
=4.86;
故答案为:4.2,4.86.
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。 | |
A: Hello, is that Wu Bin speaking? B: Yes. Who's that? A: This is Tian Hong. Are you free this Saturday evening? B: 1_______. A: I've got two tickets to Jay Chou's concert. 2_______. B: Certainly, I'd love to. He's my favorite singer. Thanks for your invitation. 3_______. A: Let's meet at the gate of the park at four o'clock. B: 4_______ I want to buy him a gift. A: OK. I'll get there at three. Shall we go to the shopping center to buy the gift? B: 5_______ See you then. A: See you.
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