hsa i definition linear regression which r linear model has a hold-one-out function how to get hold one out linear regression how do i get hat one out from linear model what is the least squares value of x how to obtain tx from the hat model hat one out regression formula how to get the least squares estimate in linear regression what is the shortcut to r? how to find fit of a linear model with multiple observations which is true about linear regression what is the least squares estimate of a linear model? hold one out regression definition which equation is the least squares estimate of hat y hold one out linear regression how to get hat value in r hold-one-out linear regression definition what's the hat in regression how to find a fit in a linear model what is the least squares estimate for a linear model