Based on the principle of objectivity, in order to reduce the correlation of variable questions, this part uses the main component analysis method to convert 7 indicator variables into new variables with high generality to reflect the characteristics of the socio-economic environment of each county (district). The above 7 socio-economic environmental indicators are imported into spssl9. After the main component analysis in version 0, the test results of KMO and Bartleet are obtained. The results of the inspection are shown in Tables 4 and 5:
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