Explaining cockpit noise level independent of flight phase

Reference no: EM1320538

Q1) High levels of cockpit noise in the aircraft can damage hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations by using a handheld sound meter. Noise level is defined as "Low" (under 88 decibels), "Medium" (88 to 91 decibels), or "High" (92 decibels or more). There are 3 flight phases (Climb, Cruise, and Descent).

Research question: At α = .05, is cockpit noise level independent of flight phase?

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

Reference no: EM1320538

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