Amanufacturer receives parts from two suppliers. an srs of 400 parts from supplier 1 finds 20 defective; an srs of 100 parts from supplier 2 finds 10 defective. let p1 and p2 be the proportion of all parts from suppliers 1 and 2, respectively, that are defective. is there evidence of a difference in the proportion of defective parts produced by the two suppliers? to make this determination, you test the hypotheses h0 : p1 = p2 and ha : p1 ≠ p2. the p-value of your test is

a) 0.1164.

b) 0.0301.

c) 0.0602.