document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=139794>Question 139794</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780072966930/algebrahomeworkh>Applied statistics in business and economics</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this<BR>\n" );
document.write( "hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld<BR>\n" );
document.write( "sound meter. Noise level is defined as “Low” (under 88 decibels), “Medium” (88 to 91 decibels), <BR>\n" );
document.write( "or “High” (92 decibels or more). There are three flight phases (Climb, Cruise, Descent). Research<BR>\n" );
document.write( "question: At &#945; = .05, is the cockpit noise level independent of flight phase?  </SPAN>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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