The Lean philosophy can be used to remove waste from all processes in a number of different ways. One area is the transmission of information about your business or process.

# Archives for December 2015

## Regression Analysis

Regression Analysis is a way of estimating the relationships between different variables by examining the behavior of the system. There are many techniques for modeling and analyzing the dependent and independent variables. For example, transformations can be used to reduce the hire-order terms in the model. Remember the equation for a line that you learned […]

## How to Calculate a Sample Size Given Standard Deviation, Confidence Interval and Margin of Error

The equation we want to use is: Sample Size = (Z*σ / Margin of Error)^2 We’ll use the following example question from the ASQ Black Belt Exam. Question: When σ = 10, what sample size is needed to specify a 95% confidence interval of ±3 units from the mean? (A) 7 (B) 11 (C) 32 (D) […]