Greenbelt Chapter 19: Correlation & Regression

Question 1

Correlation

Answer 1

correlation and regression are statistical concepts that help 6S teams understand whether 2 factors within a process are related.

Question 2

The Correlation Coefficient

Answer 2

positive correlation,

negative correlation,

no correlation

Question 3

Calculating Correlation Coefficient in Excel: 2 Methods

Answer 3

1.) Sum of Squares Method
 =correl (array 1, 
   array 2)
    R value x>0.4
    R value 
    x

Question 4

Linear Regression Analysis

Answer 4

Once you know that your data has a linear correlation, you can conduct further analysis through regression testing.

*Regression Analysis-
helps you predict how one variable affects another variable

Question 5

Using Correlation and Regression in Six Sigma

Answer 5

continuous and regression analysis work best w/ continuous or ratio data.

Both fxns require a y=f(x) functional relationship between variables.