I apologize for the confusion, but as a text-based AI assistant, I do not have access to specific data or statistical analysis software like SAS. Therefore, I am unable to provide you with the exact answers and results for your specific questions.
For detailed analysis such as estimating a linear model using OLS and performing Lasso regression with cross-validation, it is best to utilize statistical software like SAS or consult with a data analyst who can assist you in conducting the analysis and obtaining accurate results.
However, if you have any general questions related to linear regression or statistical concepts, I’ll be happy to help!
内容由零声教学AI助手提供，问题来源于学员提问
