Among fatal plane crashes that occurred during the past 5555 ​years, 634634 were due to pilot​…

Among fatal plane crashes that occurred during the past 5555
​years, 634634 were due to pilot​ error, 8989 were due to other
human​ error, 321321 were due to​ weather, 427427 were due to
mechanical​ problems, and 176176 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
nothing​%
Other human error
nothing​%
Weather
nothing​%
Mechanical problems
nothing​%
Sabotage
nothing​%
​(Round to one decimal place as​ needed.)