A standardized test is given to a ninth grade class and a fifth grade class. The superintendent believes that the variance in performance for the two grades is different. The sample variance of a sample of 12 test scores from the ninth grade class is 20.73. The sample variance of a sample of 20 test scores from the fifth grade class is 12.92. Construct the 95% confidence interval for the ratio of the population variances. Round your answers to four decimal places.