Question

The mean noise level of 20 areas designated as “casualty doors” was 63.1 dBA, and the standard deviation is 4.1 dBA. The mean noise level for 24 areas designated as “operating theaters” was 57.3 dBA and the standard deviation was 7.5 dBA.  At α = 0.01 can it be concluded that the mean casualty doors noise level is greater than the mean noise level for the operational theaters?

Answer 1