统计学是一门应用科学,它利用数学方法,通过收集、整理、分析社会经济总体数量及其相互关系变动情况,运用一系列特有的指标体系来认识事物的发展变化规律,在生产、经营、军事和日常生活等方面有广泛的应用.例1两个瓜农卖西瓜,一个售价为1元钱2公斤,另一个售价为2元 Statistics is an applied science. It uses mathematical methods to collect, collate and analyze the total number of social and economic changes and their mutual relations, and uses a series of unique index systems to understand the development and changes of things, in production, management, There are wide applications in military and daily life. Example 1 Two melon farmers sell watermelons, one sells for 1 yuan and 2 kg, and the other sells for 2 yuan.