K Among fatal plane crashes that occurred during the past 55 years 138 were due to pilot error 68 were due to other human error 113 were due to weather 459 were due to mechanical problems and 556 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 Relative Cause Frequency Pilot error Other human error Weather Mechanical problems Sabotage Round to one decimal place as needed