After running Linear Regression on MS Excel, you get the following output: SUMMARY OUTPUT Regression Statistics Multiple R 0.4770 R Square 0.2275...

What fraction of the variance in the goal variable is explained by this regression model?

The same dataset is provided to you in ARFF format as the file "practice14.arff" in Canvas. Please run a linear regression on it on Weka, using the training set for testing as well, and making sure that "attribute selection" and "collinearity checks" are turned off. Now, cross-check the Weka output with the one from MS Excel above and identify coefficients that are significantly different in the two reports.