Which of the following is NOT listed as one of the seven quality control tools in the material?

• A. Regression Analysis
• B. Check Sheets
• C. Histograms
• D. Pareto Analysis

Answer: (D)

The seven classic quality control tools are designed for quick data handling, visualization, and root-cause analysis: check sheets to collect data efficiently; histograms to show distribution; Pareto charts to highlight the most important factors; cause-and-effect (Ishikawa) diagrams to map potential causes; scatter diagrams to reveal relationships; control charts to monitor process stability over time; and flowcharts to map the process steps. Regression analysis, while a valuable statistical technique for modeling relationships and making predictions, is not one of these basic tools. It’s a broader method used for deeper statistical analysis, not part of the standard seven. That’s why regression analysis is the tool not listed among them.