How Useful is F-test in Linear Regression? | by Jae Kim | Apr, 2023
Not very much, but we can improve it.Photo by Greg Rakozy on UnsplashThe F-test statistic for joint significance of the slope coefficients of a regression is routinely reported in regression outputs, along with other key statistics such as R² and t-ratio values.The question is whether it is useful or informative as a key statistic. Does it add any value to your regression results? While it is routinely reported, one may observe that the F-statistic almost always rejects H0 in practical applications. What does it tell us…