Statistics: Regression analysis • English Conversation Questions

What is regression analysis and how is it used in statistics?
What is the difference between simple linear regression and multiple regression?
What is the least squares method and how is it used in regression analysis?
What is the coefficient of determination and how is it interpreted?
What are some common assumptions of regression analysis?
What is the difference between correlation and regression analysis?
What is the purpose of residual analysis in regression analysis?
What is the difference between in-sample and out-of-sample predictions?
What is logistic regression and how is it used in statistics?
What are some common applications of regression analysis in real life?
What are some common challenges when interpreting regression analysis results?