A national manufacturer of ball bearings h experimenting with two different procemen for producing prothion bell bepiece. It h important that the dametin is picking a mile Procgus D Mean 0,002 mm 0.0076 mm Standard deviation 0.0001 mm 0.00012 mm Sample size 12 14 The researcher is Interested in determining whether there ha goldente that the fee prosenici yeld different courage eren, Amume that the population war land devallen we equal Salve the question (10-13)Ly Moving to another question will save this response. Question 12 What is the computed value of t? OA +2.797 O B. +13.70 OC-2.797 O D.-13.70