The average credit card debt for a recent year was $9236. Five years earlier the average credit card debt was $6618 . Assume sample sizes of 35 were used and the population standard deviations of both...

The average credit card debt for a recent year was $9236. Five years earlier the average credit card debt was $6618 . Assume sample sizes of 35 were used and the population standard deviations of both samples were $1903. Find the 99% confidence interval of the difference in means. Use μ1 for the most recent average debt. Round the answers to two decimal places.