[Solved] Noise Levels in Hospitals. In the hospital study cited in Exercise 19 in Exercise set 7-1, it was found that the standard deviation of the sound
Question: Noise Levels in Hospitals. In the hospital study cited in Exercise 19 in Exercise set 7-1, 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 theatres 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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The Quadratic Equation Formula: The meaning of the term -b/2a - MathCracker.com