DEPENDENT VARIABLE: Y R-SQUARE F-RATIO P-VALUE FOR F OBSERVATIONS: 18 0.3066 7.076 0.0171 PARAMETER STANDARD VARIABLE ESTIMATE ERROR T-RATIO P-VALUE INTERCEPT 15.48 5.09 3.04 0.0008 X 21.36 8.03 2.66 0.0171 1 What is the equation of the sample regression line. Y - a + bX? 2. What does the above parameter estimate of a indicate? 3. What does the above parameter estimate of b indicate? 4, Test the intercept and slope estimates for statistical significance at the 1 percent significance level, using the p-values. Explain your answers. 5. Test the overall equation for statistical significance at the 1 percent significance level, using the p-value for the F-statistic. Explain your answer. 6. If the value of X is 20, what is the predicted value of Y? Show your computations. 7. What does the above value of the R-SQUARE statistic indicate