1. Conception of Statistic Index

Statistic Index: The index is used for statistic analysis which reflects the extent of development and changes in different phases under certain social economic phenomena.

(1) Broad Meaning of the Index: relative numbers reflecting alteration and changes on quantities. For example: dynamic relative numbers, comparative relative numbers, and relative numbers on accomplishment extent of planned program.

(2)Narrow Meaning of the Index: relative numbers reflecting comprehensive changes of complex phenomena which can not be added. For example: Retail commodity price index, consumption price index, and stock market price index.

2. Varieties of Statistic Index

(1) According to object ranges:

Individual Index: reflect the relative extent of changes in different time in individual economic phenomenon

Group Index: reflect the extent of changes in different time in multiple economic phenomena which can be added directly

General Index: comprehensively reflect the extent of general changes in different time in multiple economic phenomena which can not be added directly

(1)     According to Indexed data:

Quantity data index: reflect the relative extent of quantity data changes in different time. It includes individual index on quantity data and general index on quantity data.

Quality data index: reflect the relative extent of quality data changes in different time. It includes individual index on quality data and general index on quality data.

(2) According to calculation: Simple Index and weighted index

3. Statistic Index Function

(1) reflect the general comprehensive changes in complex social economic phenomena

(2) analyze the factors influenced by the general phenomena changes

(3) study the change trend after running for a long time

(4) carry out the valuation on complex phenomena