In a large hospital, a nursing director selected a random sample of 35 registered nurses and found that the mean of their ages was 31.6. The population standard deviation for the ages is 4.4. She selected a random sample of 30 nursing assistants and found the mean of their ages was 30.2. The population standard deviation of the ages for the assistants is 5.5. Find the 95% confidence interval of the differences in the ages. Use p, for the mean age of the registered nurses. Round the answers to one decimal place. < < x