question_answer

The tolerance specified by the designer for the diameter of a shaft is 20.00 \[\pm \] 0.025 mm. The shafts produced by three different machines A, B and C have mean diameters of 19.99 mm, 20.00 mm and 20.01 mm respectively, with same standard deviation. What will be the percentage rejection for the shafts produced by machines A, B and C?

A) Same for the machine A, B and C since the standard deviation is same for the three machines

B) Least for machine A

C) Least for machine B

D) Least for machine C.