Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism. The R-square value refers to an important indicator for determining the goodness of fit of a linear regression line. For example, an r-square of 0.6 means that the independent variable x has 60% explanatory power for the dependent variable y. This value is between 0 and 1, the bigger the better. But there is no fixed standard in actual research, if.
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