Z-scores signify a important idea within the world of Lean Six Sigma, assisting you to assess how far a data point lies from the mean of its sample . Essentially, a z-score indicates you the quantity of standard deviation between a specific result and the average score. Large z-scores suggest the observation is above the average , while smaller z-s

The Chi-square test serves as a statistical method used to analyze the correlation between two or more categorical variables. It evaluates whether there is a substantial difference between the observed and expected frequencies in a dataset. The test utilizes the concept of chi-square, which represents the sum of squared differences between the obse