Minitab determines an optimal power transformation. The Box-Cox transformation is easy to understand, but is limited and often does not determine a suitable transformation.

In This Topic What is data transformation? What does the Box-Cox transformation do? What does the Johnson transformation do? Perform a normal capability analysis with a data transformation

When you set up a normal capability analysis, click Transform and indicate whether to use the Johnson or the Box-Cox transformation to make your data follow a normal distribution.

The engineer performs the Johnson transformation to transform the data to follow a normal distribution and to store the transformed values in the worksheet for further analysis.

Find definitions and interpretation guidance for every statistic and graph that is provided with the Johnson Transformation.

Transforms the data using the transformation function. Calculates Anderson-Darling statistics and the corresponding p-value for the transformed data. Selects the transformation function that …

Find definitions and interpretation guidance for every transformation that is provided with individual distribution identification.

The Johnson transformation optimally selects a function from three families of distributions of a variable, which are easily transformed into a standard normal distribution.

On the Transform tab, select the appropriate transformation. Logarithm A logarithmic scale linearizes logarithmic relationships by changing the axis, so that the same distance represents …

To use the Box-Cox transformation, select Use a Box-Cox transformation (W = Y^λ), then select the lambda (λ) value that Minitab uses to transform the data. λ = 0 (ln): Use the natural log of …