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What’s A One-Sample Sign Test?

The One-Sample Sign Test is a hypothesis test that determines whether a statistically significant difference exists between the median of a non-normally distributed continuous data set and a standard. It provides a way to determine if there is truly a difference between the standard and a particular data set median or whether the difference is due to random chance.

An example would be testing whether a call center, that has guaranteed a median hold-time of 1 minute, is performing as promised.

Learn more about One-Sample Sign Tests in Analyze Phase, Module 4.4.2 of Black Belt Training.

How To Run A One-Sample Sign Test In SigmaXL

Download the GoLeanSixSigma.com One-Sample Sign Test Data Set for SigmaXL here.

1. Select Raw Data:

OneSampleSign-SigmaXL-RawData

2. In The Menu Click Statistical Tools > Nonparametrics > 1-Sample Sign:

OneSampleSign-SigmaXL-SelectData

3. Click on “Next”:

OneSampleSign-SigmaXL-Settings

4. Select unstacked column format

5. Highlight the data sets and click once on “Numeric Data Variable” to enter the data into the tab

6. Click on “OK”:

OneSampleSign-SigmaXL

To learn more about One-Sample Sign Tests, register for Black Belt Training and review Analyze Phase, Module 4.4.2.