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[教学内容]义务教育六年制小学数学课本第八册第四单元第102页“平均数”。[教学内容分析]平均数是统计中常用的一个指标,本册所学的是求算术平均数。算术平均数是所有观察值的总和除以总频数所得的商,简称为平均数或均数、均值。算术平均数是统计学中最易理解最常应用的一种集中量指标。集中量是代表一组数据典型水平或集中趋势的量,它能反映频数分布中大量数据向某一点集中的情况。但算术平均数易受两极数值(极大或极小)的影响。
[Teaching contents] Compulsory education Six - year primary school mathematics textbook eighth volume fourth unit p. 102 “average ”. [Teaching Content Analysis] The average is an indicator commonly used in statistics, this book is learned arithmetic mean. Arithmetic mean is the sum of all observations divided by the total frequency of the quotient, referred to as the average or mean, mean. Arithmetic mean is the most commonly used in statistics in a concentration of the most commonly used indicators. Concentration is a measure of the typical level or concentration of a set of data that reflects the concentration of large amounts of data in a frequency distribution to a point. However, the arithmetic mean is susceptible to bipolar values (maximal or minimal).