Which statement(s) are correct about the Pareto Chart shown here for the DOE analysis?

IASSC ICBB Question Answer

Which statement(s) are correct about the Pareto Chart shown here for the DOE analysis? (Note: There are 2 correct answers).

It is unknown from this graph how many factors were in the Experimental Design

The factors to keep in the mathematical model are E, D, DE, BD and B with an alpha risk equal to 2.06

The effects to keep in the mathematical model are E, D, DE, BD and B with an alpha risk equal to 0.05

The factors to keep in the mathematical model with a 5% alpha risk are BE, AB, A and AD

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