The 1-Sample Wilcoxon Signed-Rank Test is a powerful non-parametric Six Sigma tool used to compare a sample median against a specified value. It’s particularly effective when data doesn’t meet normality assumptions. This test considers both the direction and magnitude of differences, making it more robust than the 1-Sample Sign Test. By evaluating whether the sample median significantly differs from the target, it aids in validating process changes and improvements. The 1-Sample Wilcoxon test provides valuable insights into central tendencies, guiding data-driven decisions to enhance process performance and quality in Six Sigma projects.
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