Optimal Ratio for Data Splitting

02/07/2022
by   V. Roshan Joseph, et al.
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It is common to split a dataset into training and testing sets before fitting a statistical or machine learning model. However, there is no clear guidance on how much data should be used for training and testing. In this article we show that the optimal splitting ratio is √(p):1, where p is the number of parameters in a linear regression model that explains the data well.

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