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江苏省响水中学高中数学 第2章《统计》茎叶图导学案 苏教版必修3

▁▂▃▄▅▆▇█▉▊▋▌精诚凝聚 =^_^= 成就梦想 ▁▂▃▄▅▆▇█▉▊▋▌
江苏省响水中学高中数学 第 2 章《统计》茎叶图导学案 苏教版必修 3
学习目标 1 掌握茎叶图的意义及画法; 2 能在实际问题中用茎叶图进行数据统计. 一、基础知识导学 1. 茎叶图:
2. 茎叶图的制作方法:

探究二 甲、乙两蓝球运动员上赛季每场比赛的得分如下,
甲 12 , 15, 24, 25, 31, 31, 36, 36, 37, 39, 44, 49, 5 0. 乙 8, 13, 14, 16, 23, 26, 28, 33 , 38, 39, 51. (1)请用茎叶图表示上面的数据; (2)从图中分别找出甲、乙两名运动员得分的众数、中位数,比较这两位运动员的得分水 平.

三、智能基础检测

1.2003 至 2004 赛季,某球员在 NBA 一些场次的比赛中所得篮板球数为 16, 6, 3, 5,

12, 8, 13, 6, 10, 3, 19, 14, 9, 7, 10, 10, 9, 11, 6,

11, 12, 12, 9, 15, 15, 12, 13, 18, 8, 16,请制作这些数据的茎

叶图. 2.下面是某同学设计的茎叶图: 前两位

第三位

▃ ▄ ▅ ▆ ▇ █ █ ■ ▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生 ▃ ▄ ▅ ▆ ▇ █ █ ■ ▓

▁▂▃▄▅▆▇█▉▊▋▌精诚凝聚 =^_^= 成就梦想 ▁▂▃▄▅▆▇█▉▊▋▌

10

6678888

11

026

问这组数据的众数 和中位数分别是





A. 108, 108

B. 106, 108

C. 110, 108

D. 108, 116

3.某运动员 在 20 场球赛中得分的茎叶 图为:

十位

个位

0

8

1

0285699

2

2455899

3

0122

4

5

则 该 运 动 员 在 20 场 比 赛 中 得 分 在 30 分 以 上 的 ( 包 括 30 分 ) 的 百 分 比 为

(

)

A. 20%

B. 25%

C. 5%

D. 40%

4.十运会期间,体操运动员李小鹏的一组体操动作,裁判员分别亮出了 8.9 分,8.7 分,9.2

分,8.0 分,8.1 分,8.8 分,8.4 分,9.0 分,8.6 分,9.1 分,

(1)用茎叶图表示该组数据;

(2)这组数据的中位数是多少?众数是多少?

5.在某电脑杂志的一篇文章中,每个句子中所含字数的个数如下: 10 28 31 17 23 27 18 15 26 24 20 19 36 27 14 25 15 22 11 21 24 27 17 29 在某报纸的一篇文章中,每个句子中所含字数的个数如下: 27 39 33 24 2 8 19 32 41 33 27 35 12 36 41 27 1 3 22 23 18 46 32 22 18 32 (1)将这两组数据用茎叶图表示 ; (2)将这两组数据进行比较分析,你能得到什么结论?

▃ ▄ ▅ ▆ ▇ █ █ ■ ▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生 ▃ ▄ ▅ ▆ ▇ █ █ ■ ▓


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