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在统计与概率中,解决实际问题是中考命题的重点,主要内容有:收集、整理和描述数据,包括简单抽样、整理调查数据、绘制统计图表等;处理数据,包括计算平均数、中位数、众数、极差、方差等;从数据中提取信息并进行简单的推断;简单随机事件及其发生的概率.现以近年中考试题为例,把主要的考点归纳如下,供同学们参考.考点1调查方式例1(2014年内江卷)下列调查中,1调查本班同学的视力;2调查一批节能灯管的使用寿命;3为保证“神舟”九号的成功发射,对其零部件进行检查;4对乘坐某班次客车的乘客进
In statistics and probability, the solution to practical problems is the focus of the propositions in the examination. The main contents are: collecting, sorting, and describing data, including simple sampling, collating survey data, drawing statistical charts, etc.; processing data, including calculation of averages, medians , Mode, Range, Variance, etc.; extract information from the data and make simple inferences; simple random events and their probability of occurrence. Now taking the exam questions in recent years as an example, the main test points are summarized as follows for the students to refer to. Test Site 1 Survey Method Example 1 (Neijiang 2014) In the following investigations, 1 the eyesight of the classmates of the class was investigated; 2 the useful life of the energy-saving lamps was investigated; 3 the successful launch of the Shenzhou 9 was guaranteed. Its parts are inspected; 4 pairs of passengers who ride in a train