What is the evaluation method of China Property Service Enterprises 100 Top Research?

Using the method of factor analysis. Factor analysis is an analysis based on variance-covariance structure of variables.

On the basis of keeping the original information as much as possible, the variance of the original variables is explained by a few new variables by multivariate statistical analysis. This will be primitive.

The initial variable is decomposed into the sum of common factor and special factor, and the practical common factor is obtained by factor rotation, and then used

These common factors explain the variance of the original variables. When calculating the comprehensive strength of China Property Services 100, it is mainly to calculate each component.

Through the correlation matrix, the eigenvalue, cumulative eigenvalue and factor load are obtained. According to the first few eigenvalues of all features

The cumulative percentage of values is greater than or equal to a certain percentage, and the specific number of common factors is determined. Then according to the factor load matrix

Determine the actual meaning of each factor and rename it. Finally, according to the scores and load matrix of different enterprises, add

Weight accumulation constitutes the comprehensive strength index of 20 17 China Property Services 100.