50% Discount| LSS Yellow Belt

What is the 1 Proportion Test in Lean Six Sigma?

The one proportion test is a statistical test used in Six Sigma and other process improvement methodologies to determine whether a process is statistically different from a target value. This test can be used when the data are binary (e.g., pass/fail), or when the data can be converted to binary form (e.g., defects per unit). The one proportion test is also known as the null hypothesis significance test (NHST).

1 Proportion Test 


The purpose of the one proportion test is to compare the proportions of two groups. The null hypothesis states that there is no difference between the two groups, while the alternative hypothesis states that there is a difference.

To conduct a one-proportion test, we first need to calculate the pooled proportion, which is the weighted average of the two group proportions. We then calculate the standard error of the proportion, which is used to calculate the z-score. The z-score tells us how many standard deviations away from the mean our observed proportion is.

If our z-score is less than -1.96 or greater than 1.96, we can reject the null hypothesis and conclude that there is a statistically significant difference between the two groups. If our z-score is between -1.96 and 1.96, we cannot reject the null hypothesis and must conclude that there is not a statistically significant difference between the two groups.

Conclusion:


In conclusion, the one proportion test is a statistical test used in Six Sigma and other process improvement methodologies to determine whether a process is statistically different from a target value. This test can be used when the data are binary (e.g., pass/fail), or when the data can be converted to binary form (e.g., defects per unit). The one proportion test is also known as the null hypothesis significance test (NHST).

Related Articles

Lean Academy

100% Free Training Course

Looking to learn more about Lean? Take our Fundamentals of Lean course and learn how lean drives business performance.

Fundamentals of Lean - Free Lean Six Sigma Course Screenshot

Our most POPULAR COURSE

YELLOW BELT COURSE | SELF PACED | ONLINE

Rating 5
5/5

Get your Lean Six Sigma Yellow Belt Certification Online with Leanscape today. This course will help accelerate your professional career to new heights while improving your problem-solving capabilities and learning to manage projects. Engaging webinars, hands-on activities, and interactive materials.

PRICE: £167 | Flexible Payment Plans AVAILABLE

TAKE OUR QUIZ

WHICH COURSE is right for you?

Take our short quiz to find out which Lean Six Sigma Course is right for you. 

Join our Newsletter

Subscribe to the our newsletter today and be the first to access new insights, posts and udpates.

ACCELERATE YOUR CAREER

Would You Like To Level Up Your Business Skills?

Sign up to get access to our Fundamentals of Lean course for FREE!

Free 30-days free access plus certificate on completion