Question #240

An airline tracks data on its flight arrivals. Over the past six months, 65 flights on one route arrived early, 273 arrived on time, 218 were late, and 44 were cancelled. What is the probability that a flight is early? On time? Late? Cancelled? Are these outcomes mutually exclusive? what is the probability that a flight is either early or on time?

Expert's answer

The probability that a flight is early: 65/(65+273+218+44)=65/600= 0.108.

The probability that a flight is On time:273/600 = 0.455.

The probability that a flight is Late: 218/600 = 0.363.

The probability that a flight is Cancelled: 44/600 = 0.073.

The probability that a flight is either early or on time: (65+273)/600 = 0.563.

These outcomes are mutually exclusive.

## Comments

Assignment Expert31.01.19, 23:51Dear monique,

Please use the panel for submitting new questions.

monique31.01.19, 23:18Think about a population proportion that you may be interested in and propose a hypothesis test problem for this parameter

For example, you may believe that the population proportion of adults in the US who own SUVs is 0.25. Your data could be that you surveyed people leaving work at the end of the day and found that 13 out of 50 owned an SUV. Test this hypothesis at the .05 (or another) significance level. Assume a random sample.

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