PMI Risk Management Professional (PMI-RMP) — Question 43

A project manager wants to represent the distribution of uncertainty around a risk model element. However, good data on the variability of the risk model element has not been collected, and only contains minimum and maximum values.
What curve should the project manager use to represent the distribution?

Answer options

• A. Uniform
• B. Beta
• C. Normal
• D. Lognormal

Correct answer: C

Explanation

The Normal curve is the correct choice because it effectively represents distributions when only minimum and maximum values are known, assuming a symmetrical spread. The Uniform curve could represent equal likelihood across a range, but it does not capture variability. The Beta curve requires more specific data about the distribution shape, and the Lognormal curve is inappropriate without a specific skew in the data.