For a sample of 7 operating rooms takes in a hospital study, the mean noise level was 40.86 decibels and the standard deviation was 10.

For a sample of 7 operating rooms takes in a hospital study, the mean noise level was 40.86 decibels and the standard deviation was 10.6 find the 99% confidence interval of the true mean of the noise levels in the operating rooms. assume the variable distributed. round your answers to two decimal places