Noise Levels in Hospitals: In a hospital study, it was found that the standard deviation of the sound levels from 27 areas designated as "casualty doors" was 6.2 dBA and the standard deviation of 24 areas designated as operating theaters was 4.7 dBA. At a = 0.05, can you substantiate the claim that there is a difference in the standard deviations? Use a1, for the standard deviation of the sound levels from areas designated as "casualty doors."

1. State the hypothesis and identify the claim 2. Find the critical value to 2 decimal places 3. Compute the test value. Round the score value to 2 decimal places as needed 4. Make the decision 5. Summarize