List of CalculatorsControl Limit For C Chart Control Limits for IMR Chart Control Limits for NP Chart Control Limits for P Chart Control Limit For U Chart Control Limits for Xbar-R chart Control Limits for Xbar-S chart Cost of Poor Quality Guide to Master Black Belt Competency Guide to select the right Hypothesis Test Little’s Law Net Present Value Overall Equipment Efficiency (OEE) Process capability calculator Process Cycle Efficiency R Square Adjusted Sample size calculator for mann whitney test Sample Size Calculator for 1 Proportion Test Sample Size Calculator For 2 Proportion Test Sample Size Calculator For 1 Proportion Test (Finite Population) Sample Size Calculator For 2 Proportion Test (Finite Population) Sample Size calculator For 1 Sample T Test Sample Size Calculator For 2 Sample T Test Sample Size Calculator For 1 Sample T Test (Finite Population) Sample Size Calculator For 2 Sample T Test (Finite Population) Sample Size Estimation (Mean) Sample Size Estimation(Proportion Data) Sigma Level Calculator (Continuous Data) Sigma Level Calculator (Discrete Data – Defects) Sigma Level Calculator (Discrete Data – Defectives) Takt Time Sample Size Estimation (Mean) Hint: Use this calculator to estimate the Sample Size for a given Margin of Error (Acceptable Difference) for continuous data (mean). E.g. You want to check the average time for a transaction and your research shows a standard deviation of 2.5 in the transaction time. You are okay if your survey result is ±5% of actual mean. How many transactions will you monitor to be 95% sure that the average time is correct? Confidence LevelIn the above example it is 95% 90%95%99%99.9%Known Standard DeviationThis is the historic or the researched standard deviation. In the above example, it is 2.5 Acceptable Difference % or the Margin of Error. In above example it is 5%. Just enter 5 Estimated Sample Size Δ
