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
|