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数据统计在当今时代很受重视,其过程包括对数据的收集、整理、描述和分析等.结合典型实例进行分析,是学习数据统计的重要方式.本文以空气检测为例,介绍抽样调查和直方图,反映“用样本估计总体”的统计思想.空气质量指数(AQI)是定量描述空气质量状况的数据.人们根据对空气中的主要污染物(包括细颗粒物PM_(25)、可吸入颗粒物PM_(10)、二氧化硫、二氧化氮、臭氧、一氧化碳等)含量的检测,按规定的方法得出相应的数值.空气质量指数按数值大小划分为0~50,51~100,101~150,151~200,201~300和大于300
Data statistics are highly valued in today’s era, and the process includes data collection, collation, description and analysis, etc. Combined with typical examples, it is an important way to learn data statistics.This paper takes the air testing as an example, The figure, which reflects the statistical idea of “estimating the population by sample.” The air quality index (AQI) is a quantitative description of the air quality status of the population.According to the main pollutants in the air (including fine PM_ (25), inhalable The detection of the content of PM 10, SO 2, NO 2, O 2, CO, etc.), the corresponding values are obtained according to the stipulated methods.The air quality index is divided into 0 ~ 50, 51 ~ 100, 101 ~ 150, 151 ~ 200, 201 ~ 300 and greater than 300