What determines if a transformation is necessary

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What determines if a transformation is necessary?

After a standard regression analysis, the residual plot is random.

The r-squared of the original data is close to 1.

After the original data are plotted on a scatterplot, the data are linear.

After standard regression analysis, the residual plot is not random.

If the correlation coefficient of the original data is negative

Reference no: EM133245345

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