how to test the validity of a linear regression model how to compare mse of healthy and alzheimer's patients how to compare mse with a healthy patient how to test whether a linear regression model works for alzheimer's why cross validation for a linear regression model ailment vs disease cross validation how can you determine the mse of a healthy alzheimer's patient how do i test the mse? can you check the significance of the mse of the sample from a healthy patient is cross validation important how to test for an alzheimer's model how to compare mean squared error between different samples how to test if there is any difference in mse how to measure mse in a linear regression model how to find mean squared error for alzheimer's what is the difference between a healthy alzheimer's and a diseased mse if there is a difference in mse, does it make sense for the model to be cross validated why would you cross validation the mse? why use cross validation can an alzheimer's disease model be used as cross validation?