In Exercise 24, suppose that we interpret the standard as meaning that there should be only a
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In Exercise 24, suppose that we interpret the standard as meaning that there should be only a small probability (no more than 10%) that the time-weighted sound level at a site will exceed 90 dBA. In 70 independent measurements of the sound level, you find 10 instances where the noise exceeds 90 dBA. Using
α = 0.1, should the company begin requiring ear protection?
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