RT Book, Section A1 Arthur, Jay SR Print(0) ID 1150320605 T1 Statistical Tools for Lean Six Sigma T2 Lean Six Sigma for Hospitals: Improving Patient Safety, Patient Flow and the Bottom Line, 2e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259641084 LK accessmedicine.mhmedical.com/content.aspx?aid=1150320605 RD 2024/04/25 AB Some tools of Lean Six Sigma aren't graphical; they're simply analytical. Sometimes you want to be able to compare two processes or products and learn something about their quality using statistics alone. Healthcare research often uses these tools to compare the effects of two or more medications or protocols. Six Sigma practitioners can use these tools to compare performance before and after an improvement to verify its effectiveness. This falls under the category of something known as hypothesis testing.