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What’s a One Proportion Test?

The One Proportion test is a hypothesis test that can be used to determine whether a process is performing at the level of an established standard. It provides a way to determine if there is a statistically significant difference between the standard and a particular data set or whether the difference is due to random chance.

An example would be testing if a vendor that has guaranteed 48 hour delivery is performing as promised.

Learn more about One Proportion Tests in Analyze Phase, Module 4.2.1 of Black Belt Training.

How to Run a One Proportion Test in Minitab

1. Select Raw Data:


2. Go to Stat > Basic Statistics > 1 Proportion:


3. Click on “Options”

4. Select the “Normal Approximation” listed below:


5. Click “OK”:


To learn more about One Proportion Tests, register for Black Belt Training and review Analyze Phase, Module 4.2.1.