24 Data Samples

Write a short report to answer these questions: 1. Provide a brief background of the situation you are going to look at. Specifically, why is your dependent variable interesting or significant? Indicate the general model that you are going to estimate. Discuss what you think the relationship is between the dependent variable and the independent variables, and what that leads you to conclude about the expected signs of the coefficients in the model. 2. Describe your data and how it was collected. (Provide data source) 3. Is simple linear regression appropriate for this data? Justify by looking at/referring to the scatter plot. Even if your answer is no, proceed with the rest of the assignment. 4. State the fitted regression line and interpret the regression coefficients? 5. State and interpret the coefficient of determination.

Statistical Inference Assignment No. 7 6. Use your regression line to make a prediction. Show your work by taking two observation of the independent variable between the range of it and two its observation outside its range. 7. Do you think your linear regression is good if yes then why? 8. Test the regression coefficient (intercept) and interpret your results. 9. Construct 90% confidence interval for the regression coefficient (intercept) and interpret it. 10. Test the regression coefficient (Slope) and interpret your results. 11. Construct 95% confidence interval for the regression coefficient (Slope) and interpret it. 12. Find the correlation and interpret your results.