Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).

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Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).

A . Two factors were operated at 3 levels each
B . The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level
C . The design indicated above is a 32 factorial design
D . The cutting speed and cutting angle are at the low level for the least tool age achieved
E . All factors had 2 levels in the experiment

Answer: B,C,E

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