(Answered) 1 a department of transportation report about air travel

Statistics

1. A Department of Transportation report about air travel found that nationwide, 76% of all flights are on time. Base the following questions on 125 randomly selected flights. You may assume the only outcomes are that a flight is either late or is on time. (For all probabilities round to tenth of a percent)

a) How many flights would you expect to be late?

b) Calculate the standard deviation? (round to hundredths)

c) What is the probability you will have exactly 80 flights on time?

d) What is the probability you will have 20 or

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