References

You can refer to the following articles:

• Determine the Root Cause: 5 Whys. Retrieved from https://www.isixsigma.com/tools-templates/cause-effect/determine-root-cause-5-whys/
• Gettysburg Address, (1863, November 19). Retrieved from Abraham Lincoln Online: http://www.abrahamlincolnonline.org/lincoln/speeches/gettysburg.html
• Stevens, S. (1946). On the Theory of Scales of Measurement. Science
• Wikipedia. Bias-variance tradeoff. Retrieved from Wikipedia: https://en.wikipedia.org/wiki/Bias%E2%80%93variance_tradeoff