If the mean of an exponential distribution is 2,then the value of the parameter λ is

A) 0
B) 2.0
C) 0.5
D) 1.0

Exponential Distribution

A probability distribution used to model the time between events in a process where events occur continuously and independently at a constant rate.

Parameter

A measurable feature or characteristic that helps to define or classify a system, often a constant in mathematical models and statistical analyses.