| Summary: | 碩士 === 國防管理學院 === 資源管理研究所 === 86 === The application of financial ratio is prevailing in the academic and practical fields as well. However, the normal distribution properties of financial ratios is always indicate for statistics purpose, the signification embedded in it is mentioned rarely in terms of economic substance and practical implication. Theoretically, normal distribution can represents a concept of "competition"; consequently, the function to explore the financial ratios of firms being normal distribution or not is similar to that for exploring competition situation of each firms in the same industry. If the financial ratio of an industry is of normal or quasi-normal distribution, the closer the financial ratio of one firm lies to the mean, the more possibility this firm stands for survival.
The purpose of sciectific studies is to find out the truth behind the problems and search for the principle of similar facts. So, this paper adopts accounting information of domestic listed companies, and uses the egression approach to take account of other control variables to enhance control ability. According to empirical evidence, I found that most of the financial ratios were distributed in a manner that was significantly different from a normal distribution, but the more control variables were added, the greater degree of normality in the refind data. The behind reasons may be the problem of industrial blocking and the instability of the economic environment. Beside, I try to apply results of this study on credit rating. It is found that liquidity ratio can be an important index.
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