Statistics MG 620-Is Regression Analysis always useful in predicting values

Managerial Statistics MG 620 for Monroe College

Hi, I need help with these questions.

Question 1. Is Regression Analysis always useful in predicting values?Discuss with examples.<?xml:namespace prefix = o ns = “urn:schemas-microsoft-com:office:office” />

Question 2. A regression line, derived from the least squares mentod(OLS), has only two properties. True or false. If yes, explain. If no, explainwith examples

Question 3. There is no difference(s) between the standard error of thesample mean and the standard error of the regression. If true, explain. Iffalse, explain.

Question 4. Do the correlation coefficient and the regression r-squaredmeasure the same concepts. Explain

Thank you