R language constructs regression model diagnosis (normality is invalid), performs variable transformation, and uses powertransform function in car package to perform box Cox transform to normality on

R Language to build regression model and carry out model diagnosis （ When normality is not satisfied ）、 Perform variable transformation （Transforming variables）、 Use car In bag powerTransform Function on the target variable Box-Cox Transformation （Box–Cox transformation to normality）

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