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Hearing levels or cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. Noise level is described as Low=under 88 decibels, Medium=88-91 decibels, High=92^decibels. At a = .05, is the cockpit noise level independent of flight phase? NOISE

Noise Climb Cruise Descent Row Total
Level
Low 6 2 6 14
Medium 18 3 8 29
High 1 3 14 18
Col total 25 8 28 61

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