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Among fatal plane crashes that occurred during the past

60

years,

332

were due to pilot error,

72

were due to other human error,

552

were due to weather,

534

were due to mechanical problems, and

294

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?

Question content area bottom

Part 1

Complete the relative frequency distribution below.

Cause	Relative Frequency
Pilot error	1.81.8%
Other human error	44%
Weather	33%
Mechanical problems	enter your response here%
Sabotage	enter your response here%

(Round to one decimal place as needed.)

Part 2

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.

Weatheris

the most serious threat to aviation safety.

Weather

monitoring

systems

could

be

improved.

C.

Mechanicalproblemsare

the most serious threat to aviation safety.

New

planes

could

be

better

engineered.

D.

Piloterroris

the most serious threat to aviation safety.

Pilots

could

be

better

trained.