Question 18 1 pt. Find the required confidence interval for the slope of the regression equation. You may assume the conditions for regression inference are satisfied. Applicants for a particular job, which involves extensive travel in Spanish-speaking countries, must take a proficiency test in Spanish. The sample data were obtained in a study of the relationship between the numbers of years applicants have studied Spanish and their score on the test. Use the regression analysis given below to find a ?9%% confidence interval for the slope of the regression line. Dependent variable is Score R squared - 83.0% s - 5.65138 with 10 - 2 - 8 degrees of freedom Variable Coefficient se. of Coeff -ratio prob Constant 3153333 6 360418 4.953745 0.09111 Number of years 1090476 1741054 6 25 538 0.0002 45 (25.70. 37.40) O (5.23, 16.57) (5.05. 16.76) O (9.16, 12.65) (6.88, 14.93) D Question 19 1 pts