In a large hospital, a nursing director selected a random sample of 37 registered nurses and found that the mean of their ages was 32.6. The population standard deviation for the ages is 4.1. She selected a random sample of 31 nursing assistants and found the mean of their ages was 30.4. The population standard deviation of the ages for the assistants is 5.8. Find the 95% confidence interval of the differences in the ages. Use u, for the mean age of the registered nurses. Round the answers to one decimal place.

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