The relevant departments of Dongpo City planned a selection activity of "ranking the ranking of the city's ideal living quarters". The method is to select ten indicators, which involve the residential hardware facilities (house quality, supporting facilities, etc. ), environmental sanitation, greening degree, public security Condition, the convenience of transportation, etc. Each index is evaluated based on the actual quality or quantity, and a certain value from 1 to 10 points, and then the average of the ten points is obtained, and the ranking is ranked according to its level. All the following items must be assumed for the feasibility of the above plan, except. ['The importance of each indicator is basically equal.', 'The measurement of various indicators can be more accurately quantified.', 'The conditions reflected by the measurement data of various indicators have a long-term stability.', 'If the content of the index is modified accordingly, this selection method is general, for example, it can be used to evaluate "ranking of key middle schools in the city".']