Noise Levels in Hospitals In a hospital study, it was found that the standard deviation of

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Noise Levels in Hospitals In a hospital study, it was found that the standard deviation of the sound levels from 20 areas designated as “casualty doors” was 4.1 dBA and the standard deviation of 24 areas designated as operating theaters was 7.5 dBA. At a  0.05, can you substantiate the claim that there is a difference in the standard deviations

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