从统计图分析数据的集中趋势

6.3 从统计图分析数据 的集中趋势
预习检测
1.为了检查面包的质量是否达标,随机抽取了同种 规格的面包10个,这10个面包的质量如下图所示：
这10个面包质量的中位数是100克，众数是 100克， 估算平均质量是 99.8克。算一算验证你的估计。
预习检测 2.某次射击比赛，甲队员的成绩如下图：
根据统计图，确定10次射击成绩的众数 9环 、 中位数 9环 ， 先估计这10次射击成绩的平均数为 9环 ，再
探究提纲
2.自学课本146页例题.根据例题的解法，完 成“做一做”中提出的问题.
例题讲解
• 某地连续10天高温，其中日最高气温与天数之 间的关系如图所示：
具体算一算，看看你的估计水平如何。
成绩
甲队员10次射击成绩
10
wenku.baidu.com9.8
9.6
9.4
9.2
9
8.8
8.6
8.4
8.2
8
次数
1 2 3 4 5 6 7 8 9 10
A B CD
探究提纲
1.学习课本145页“议一议”. 要求：根据所给图形回答“议一议”提出的问题.
甲、乙、丙三支青年排球队各有12名队员，三队 队员的年龄情况如下图：
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