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2 为了确定灯泡的使用寿命,在一批灯泡中随机抽取 100 个进行测试,所得结果如下, 716 728 719 685 709 691 684 705 718 715 712 722 691 708 690 692 707 701 729 694 681 695 685 706 661 735 665 710 693 697 674 658 698 666 696 698 692 691 747 699 682 698 700 710 722 690 736 689 696 651 673 749 708 727 689 683 685 702 741 698 713 676 702 671 718 707 683 717 733 712 683 692 697 664 681 721 720 677 679 695 691 699 725 726 704 729 703 696 717 688 要求: ( 1 )利用计算机对上面的数据进行排序。 ( 2 )以组距为 10 进行等距分组,整理成频数分布表。 ( 3 )根据分组数据绘制直方图,说明数据分布的特点。 ( 4 )制作茎叶图,并与直方图做比较。
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举一反三
【简答题】According to a Yale dissertation by William Ickinger about the study of our use of space, which pairs stand closest among the female pairs, female/male pairs, and male/male pairs?
【简答题】离退休综合征名词解释离退休综合征
【单选题】What does the sentence 'Well, l just did!' mean?
A.
I just did something for the boy andhe would be happy.
B.
I just bought a nice doll for myself and I would be happy.
C.
I just bought a present for Grandma and she would be happy.
D.
I just did something for the boy and it would make me happy.
【单选题】足弓的前部是( )跖骨头两个点着地,后部是跟骨结节一个点着地。
A.
第一和第五
B.
第二和第三
C.
第三和第四
D.
第四和第五
【判断题】足弓的前部是第一和第三跖骨头两个点着地,后部是跟骨结节一个点着地。
A.
正确
B.
错误
【单选题】— Hey! Kelin. Happy new year! _____. — It is good. My grandma kept cooking and cooking, so I just kept eating. [     ]
A.
How was your holiday?
B.
How is your grandma?
C.
Where did you go for holiday?
D.
What did you do in your holiday?
【多选题】在产业集群内,知识溢出的途径可能通过以下哪种方式( )
A.
不同企业员工的日常交流
B.
企业员工跳槽
C.
一些核心技术人员之间的私人关系
D.
大企业员工的自主创业过程
【简答题】离退休综合征
【单选题】According to the index model, covariances among security pairs are
A.
due to the influence of a single common factor represented by the market index return.
B.
extremely difficult to calculate.
C.
related to industry-specific events.
D.
usually negative.
【单选题】听力原文:M: Hi,Sis. I just came over to drop off the DVDs you wanted,and…Hey,wow!Where did you get all of this stuff? W: I bought it. So,what do you think of my new entertainment center?And the Widescreen...
A.
A digital camera
B.
A TV
C.
A stereo
D.
A DVD player
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