Exponential Distribution describes the times in between events a process in which events occur continuously and independently at a constant average rate.

If the number of occurrences of some event follows a Poisson distribution, the time between successive occurrences will follow an Exponential Distribution.

## When is the exponential distribution used?

• Describes the times in between events a process in which events occur continuously and independently at a constant average rate.
• To describe the time between successive occurrences when all occurrences follow an Exponential Distribution.
• To predict the length of time that properly maintained equipment will operate.
• To approximate the time between outcomes. (See Poisson)
• When a probability of an outcome is consistent throughout the time period.

http://www.public.iastate.edu/~riczw/stat330s11/lecture/lec13.pdf

## Six Sigma Black Belt Certification Exponential Distribution Questions:

Question: If a process follows an exponential distribution with a mean of 25, what is the standard deviation for the process? (Taken from ASQ sample Black Belt exam.)

(A) 0.4
(B) 5.0
(C) 12.5
(D) 25.0

This section requires you to be logged in to either a Pass Your Six Sigma Exam or a free account. Sign up in seconds with the buttons below!

OR

OR