Among fatal plane crashes that occurred during the past

65

years,

421

were due to pilot error,

54

were due to other human error,

457

were due to weather,

260

were due to mechanical problems, and

691

were due to sabotage. Construct the relative frequency distribution. What is the most serious threat to aviation safety, and can anything be done about it?

Complete the relative frequency distribution below.

Cause	Relative Frequency
Pilot error	enter your response here%
Other human error	enter your response here%
Weather	enter your response here%
Mechanical problems	enter your response here%
Sabotage	enter your response here%

(Round to one decimal place as needed.)What is the most serious threat to aviation safety, and can anything be done about it?

A.

Sabotageis

the most serious threat to aviation safety.

Airport

security

could

be

increased.

B.

Piloterroris

the most serious threat to aviation safety.

Pilots

could

be

better

trained.

C.

Mechanicalproblemsare

the most serious threat to aviation safety.

New

planes

could

be

better

engineered.

D.

Weatheris

the most serious threat to aviation safety.

Weather

monitoring

systems

could

be