(Solved): Among fatal plane crashes that occurred during the past 70 years, 272 were due to pilot error, 81 w ...

Among fatal plane crashes that occurred during the past 70 years, 272 were due to pilot error, 81 were due to other human error, 436 were due to weather, 438 were due to mechanical problems, and 422 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