Question
Which of the following distribution methods or models can most effectively represent the actual arrival times of a bus that runs on an hourly schedule?
- A. Binomial
- B. Exponential
- C. Normal Correct
- D. Poisson
Explanation
A scheduled bus is aimed at a fixed time each hour, so its actual arrival times cluster symmetrically around the scheduled time with small random deviations early or late, which a normal distribution models well. Exponential and Poisson describe random, unscheduled events: the waiting time between independent arrivals and the count of arrivals in an interval. Binomial counts successes in a fixed number of yes/no trials, not a continuous time.
