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[设计思路]本节主要让学生认识平均数是数据统计中基本统计量,可描述一组数据的集中趋势,也是学生学会分析数据,作出决策的基础。平均数与学生生活密切相关,能直接指导学生的生活实践。所以通过激发学生学习兴趣,小组交流、合作,展示成果,教师对展示成果的评价,研讨有价值的问题;重视生成,归纳方法。加深理解,最后检测学习效果,发现问题,及时总结。[目标预设]知识目标:理解算术平均数的意义,会计算一组数据的
[Design ideas] This section allows students to understand the average number of basic statistical statistics, can describe the concentration of a group of data trends, but also students learn to analyze data, the basis for decision-making. The average is closely related to student life and can directly guide students’ life practice. Therefore, by stimulating students interest in learning, group exchanges, cooperation, show the results of the teacher’s evaluation of the results of the exhibition, discuss valuable issues; attention to generate and summarize methods. Deepen understanding, the final test of learning effectiveness, identify problems, timely summary. [Target Preset] Knowledge Goal: To understand the meaning of the arithmetic mean, a set of data