Weekly Quiz -1 Predictive Modeling (Linear Regression).pdf - Weekly Quiz 1(Predictive Modeling Type Questions Attempts Time Graded Quiz 10 1\/1 20m

# Weekly Quiz -1 Predictive Modeling (Linear Regression).pdf...

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Weekly Quiz - 1 (Predictive Modeling) Type : Graded Quiz Attempts : 1/1 Questions : 10 Time : 20m Question No: 1 Degree of freedom Sum of squares Mean of the squares Regression 1 1258.548639 (SSR) 1258.548639 (MSR) Residual 6 773.4513612 ( SSE) 128.9085602 (MSE) Total 7 2032 (SST) Based on the above Table what is the value of F Statistic? 1.62 6 0.61 9.76 Note: The F value is the ratio of the mean regression sum of squares (MSR) divided by the mean error sum of squares (MSE) So F Statistic is 1258.548639 / 128.9085602 = 9.76 (rounded to 2 decimal places). Question No: 2 Correlation Coefficient takes values between +1 and -1. True False Note: Correlation coefficient formulas are used to find how strong a relationship is between data. The formulas return a value between -1 and 1. Question No: 3 As per assumptions of Linear Regression: Variance of the error terms should be HeteroscedasticHomoscedasticNote: The error terms should be Homoscedastic i.e. the error terms should have constant variance across different values of independent variable. Question No: 4 DfSum of squaresMean of the squaresRegression 1258.548639 1  #### You've reached the end of your free preview.

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• Winter '18
• Narayan
• • • 