IASSC Certified Lean Six Sigma Black Belt (ICBB) — Question 48

Which of the following is used to model lifetimes of certain elements?

Answer options

• A. Exponential distribution
• B. Normal distribution
• C. Poisson distribution
• D. Weibull distribution

Correct answer: A

Explanation

The Exponential distribution is primarily used to model the time until an event occurs, making it suitable for lifetimes of components. The Normal distribution is used for data that clusters around a mean, the Poisson distribution is used for counting events in a fixed interval, and the Weibull distribution, while also applicable to lifetimes, is not the primary choice for modeling lifetimes of certain elements.