Z-scores signify a important notion within the Lean Six Sigma methodology , helping you to evaluate how far a observation lies from the average of its population. Essentially, a z-score indicates you the number of standard deviation between a specific result and the average score. Positive z-scores suggest the data point is above the mean , while l

The Chi-square test acts as a statistical tool used to assess the connection between two or more categorical variables. This measures whether there is a meaningful difference between the observed and expected frequencies in a dataset. The test relies the concept of chi-square, which represents the sum of squared differences between the observed and