由同一测试人员用同一测试设备在短时间内对某一物理量进行多次重复观测时,人们发现:虽然某一次观测的结果得什么值是偶然的,但观测次数足够多时,观测数据的分布情况呈现一定的规律性。例如,对某一物理量作了100次重复观测,得数据如下:0.12、 When the same tester repeated the observation of a certain physical quantity in a short period of time by the same tester, it was found that although the value of the result of a certain observation was accidental, the observation data distribution was sufficient when the number of observations was sufficiently large Showing a certain regularity. For example, a repeated observation of a physical quantity made 100 times, the data are as follows: 0.12,