Which of the following distributions is suitable to model the length of time that elapses before the first telephone call is received by a switchboard?
A) Exponential.
B) Normal.
C) Poisson.
D) Uniform.

Question

Which of the following distributions is suitable to model the length of time that elapses before the first telephone call is received by a switchboard? 
A) Exponential.
B) Normal.
C) Poisson.
D) Uniform.

Quizplus · Accepted Answer

The length of time before the first telephone call being received by a switchboard would follow an exponential distribution. This is because the time between two consecutive calls is independent and the probability of any given call arriving is constant over time.

Which of the Following Distributions Is Suitable to Model the Length