Results 2 issues of Jackson Leung

The question require us to scale each observation to have mean 0 and SD 1, not each predictor, in order to produce the desire proportionality. Suggested answer: data(USArrests) **scale_data =...

The question requires the use of multiple linear regression. The predictor "origin" is stored as a num, but it is a qualitative data. Shouldn't it be change to factor using...