Among fatal plane crashes that occurred during the past 55 years, 619 were due to pilot error, 85 were due to other human error, 574 were due to weather, 566 were due to mechanical problems, and 524 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?

Relative Frequency = Observed value for each cell / Total frequency * 100

Cause                       Relative Frequency

Pilot Error                           619

Other human error             85

Weather                              574

Mechanical problems        566

Sabotage                            524

Total                                   2368

The total frequency is 2368

The calculation of the relative frequency distribution is

Cause                          Relative Frequency           Result

Pilot Error                         619/2368 * 100              26.14%

Other human error           85/2368 * 100               3.59%

Weather                            574/2368 * 100             24.24%

Mechanical problems      566/2368 * 100             23.90%

Sabotage                          524/2368 * 100             22.13%

Total                                                                          100%

Conclusion: The most serious threat to aviation safety is the Pilot error as it has the highest frequency. Pilot need to be more equipped with understanding and knowledge of how to deal with unexpected event i.e. turbulence, engine failure among others..

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