Suppose flights at a large metropolitan airport are on-time 68% of the time and late 32% of the time. We want to use a table of random digits to simulate flight status (on-time or late), so we'll assign 01, 02, … , 68 to represent on-time flights, and 69, 70, … , 99, 00 to represent late flights.
You want to estimate the probability that 15 or more flights out of 20 will be on-time at this airport. You simulate 20 flights 25 times and get the following numbers of on-time flights:

What is your estimate of the probability?
A) 0.16
B) 0.48
C) 0.52
D) 0.56
E) 13

Question

Suppose flights at a large metropolitan airport are on-time 68% of the time and late 32% of the time. We want to use a table of random digits to simulate flight status (on-time or late), so we'll assign 01, 02, … , 68 to represent on-time flights, and 69, 70, … , 99, 00 to represent late flights.
You want to estimate the probability that 15 or more flights out of 20 will be on-time at this airport. You simulate 20 flights 25 times and get the following numbers of on-time flights:

What is your estimate of the probability?
A) 0.16 
B) 0.48 
C) 0.52 
D) 0.56 
E) 13

Quizplus · Accepted Answer

The Answer is C

Suppose Flights at a Large Metropolitan Airport Are On-Time 68