Chart Text Shape Media Comme The regression equation with the actual intercept and slope estimates is: y = 62.6 + - 2.4x, + 18.8x2 + 1.7x3 + - 7.9x4 + - 0.05x5 1. Based on these results, what is the estimated mean waiting time for females who identify as white, who do not have private insurance, with systolic blood pressures of 125 mmHg? 2. Based on these results, what is the estimated mean difference in waiting times for the group from question 1 compared to males who identify as black, who have private insurance and systolic blood pressures of 115 mmHg? 3. What is the average difference in waiting times for those who identify as black compared to those who identify as white, adjusted for sex, insurance type, and systolic blood pressure? 4. The standard error for B2, SE(B2)=1.3. Estimate a 95% CI for the adjusted mean difference from item 3. 5. What addition information is needed to determine whether the relationship between waiting times and racial identify is confounded by at least one of the following: sex, insurance type, and/or systolic blood pressure? 6. What is the assumed nature of the relationship between waiting times and systolic blood pressure for the regression model presented above? 7. How could one check the assumption from item 6? 8. The adjusted R2 for this model is 1.1%. What is the best explanation of for this given that some of these adjusted associations are statistically significant? 9. What additional information is needed to determine whether the relationship between waiting times and racial identity is confounded by at least one of the following: sex, insurance type, and/or systolic blood pressure