A student with two summer jobs earns $10 per hour at a cafe and $8 per hour at a market the student would like to earn at least
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Answer:
Relative frequency:
The most serious threat to aviation safety is, according to this data, "mechanical failures". It can be improved by more rigorous inspection and better maintenance policies and execution.
Step-by-step explanation:
We have the data for fatal plane crashes. The sum of plane crashes is
We can calculate the relative frequency as:
We can see that the most frequent cause is "mechanical problems", with a relative frequency of 0.45.