Z-scores represent a important concept within Lean Six Sigma , assisting you to assess how far a observation lies from the average of its dataset . Essentially, a z-score indicates you the number of standard deviations between a specific result and the average score. Higher z-scores suggest the value is above the average , while negative z-scores s

The Chi-square test acts as a statistical technique used to analyze the relationship between two or more categorical variables. It determines whether there is a substantial difference between the observed and expected frequencies in a dataset. The test depends on the concept of chi-square, which indicates the sum of squared differences between the