Z-scores are a important idea within the Lean Six Sigma methodology , enabling you to evaluate how far a observation lies from the average of its sample . Essentially, a z-score indicates you the number of standard deviations between a specific value and the average . Large z-scores imply the value is above the typical, while negative z-scores show

The Chi-square test serves as a statistical tool used to assess the connection between two or more categorical variables. This evaluates whether there is a significant difference between the observed and expected frequencies in a dataset. The test depends on the concept of chi-square, which shows the sum of squared differences between the observed