5. The following results are when use Years of Education and Years of Work to explain/predict Monthly Income. a. For this particular regression, explain what the R Squared value means? Why is the Adjusted R Squared smaller than the regular R Squared? b. What is the F Value or F Statistic for "the F test?" Is it statistically significant at the 5% level? What does this tell us? c. What has a larger impact on Monthly Income, Years of Education or Years of Work? d. What is the standard error for Years of Education? What does it tell us? e. What is the t value for Years of Education? What are we testing with this t value, in other words, what is the null hypothesis? Given this result, should we reject or not reject the null hypothesis? f. What is the p value for Years of Education? What does this p value tell us? Variance Explained R R Square Adjusted R Square Std. Error of the Estimate 0.946 0.896 0.866 1.1405 ANOVA Results Sum of Squares df Mean Square F Value P Value Regression 78.295 2 39.147 30.095 0.000 Residual 9.105 7 1.301 Total 87.400 9 Regression Coefficients Un- Standardized Coefficients standardized Coefficients B Std. Error Beta Intercept -5.504 1.298 t Value -4.421 p Value 0.004 Years Edu. 0.495 0.094 0.676 5.270 0.001 Years Work 0.210 0.056 0.485 3.783 0007
5. The following results are when use Years of Education and Years of Work to explain/predict Monthly Income. a. For this particular regression, explain what the R Squared value means? Why is the Adjusted R Squared smaller than the regular R Squared? b. What is the F Value or F Statistic for "the F test?" Is it statistically significant at the 5% level? What does this tell us? c. What has a larger impact on Monthly Income, Years of Education or Years of Work? d. What is the standard error for Years of Education? What does it tell us? e. What is the t value for Years of Education? What are we testing with this t value, in other words, what is the null hypothesis? Given this result, should we reject or not reject the null hypothesis? f. What is the p value for Years of Education? What does this p value tell us? Variance Explained R R Square Adjusted R Square Std. Error of the Estimate 0.946 0.896 0.866 1.1405 ANOVA Results Sum of Squares df Mean Square F Value P Value Regression 78.295 2 39.147 30.095 0.000 Residual 9.105 7 1.301 Total 87.400 9 Regression Coefficients Un- Standardized Coefficients standardized Coefficients B Std. Error Beta Intercept -5.504 1.298 t Value -4.421 p Value 0.004 Years Edu. 0.495 0.094 0.676 5.270 0.001 Years Work 0.210 0.056 0.485 3.783 0007
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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