Hypothesis Testing is as easy as 1,2,3 (#41)

 Hypothesis Testing is a statistical tool used to determine a relationship between one variable and another. This blog includes an example of a Hypothesis test in a clear, definable guide.

Tire Pressure vs Tread Wear

Define the Variable Inquiry:
-Does raising the tire pressure directly result in increased tread wear?

Define “X”
-X Equals Tire Pressure

Define “Y”
-Y Equals Tread Wear
**Y is the variable that is being measured

Perform Analysis Testing
-Collect Data
-Compute Pearson Correlation Co-efficient and P-Value

Perform Correlation Analysis
-Use Pearson values
-Ex: Pearson(r) = 0.554 with a P-Value = 0.0228

From these results we can conclude a medium relationship between the two variables. Also, the included data is significant to the results at the Alpha risk level of 0.0228.

Here is what the “R” Values mean:
-A value in-between positive 0.2 and negative 0.2 could cause a random chance of a relationship
-A value in-between positive 0.8 and 1.0 as well as negative 0.8 and 1.0 is cause for a strong chance of a relationship

Any value found outside of the previously mentioned boundaries would reveal a weak to moderate relationship between the two variables.

Correlation is NOT causation! Correlation Analysis assesses how strong the relationship is between variables. The R Value reveals how strong the relationship is between the two variables and the P Value reveals how significant that relationship is.


Hopefully this provides a clearer view into the value of Hypothesis Testing. Comment with some of your own experiences with Hypothesis Testing! 


About Six Sigma Development Solutions, Inc.
We are Certified as an Accredited Training Organization with the International Association of Six Sigma Certification (IASSC)
“The IASSC Accredited Training Organization (ATO) designation validates Six Sigma Development Solutions, Inc. has demonstrated adequate management systems, courseware with a high degree of correlation to the subject matter contained in the IASSC Bodies of Knowledge, delivery schema consistent with such content and highly qualified instructors.”
We Provide Public Lean Six Sigma Green Belt and Lean Six Sigma Black Belt Certification Training Courses in 34 Cities across the globe.
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We Provide Onsite Lean Six Sigma Certification Training. Some of the training's we provide are: Lean Six Sigma Black Belt, Lean Six Sigma Green Belt, Lean Six Sigma Yellow Belt, Lean Six Sigma Champions Training and Lean Certifications for Healthcare, Finance, I.T, Manufacturing, Processing, Logistics, Retail Sales and Government.
SSDSI will come to your site to train for your choice of the Lean Six Sigma Certification Levels. Onsite training is more cost effective than open enrollment training when training larger groups of team members.
Benefits of Onsite Training:
The Training is focused on Your Opportunities
SSDSI uses your opportunities in class (vs. generic examples)
You will get the experience of a seasoned Lean and Six Sigma Master Black Belt who will help mentor you while completing your Lean and Six Sigma Project
You can train up to 20 employees for one fixed cost (this cost includes course ware and the instructors travel & lodging)
Our courses are full of games, simulations, and active learning to help the adult learner
SSDSI can customize the training to meet your company’s particular training needs
Call Kevin Clay at 214-731-3176 or email at kclay@sixsigmadsi.com for more information

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