a) One production process yielded 80 defective pieces in a random sample of size 400 while another yielded 75 defective pieces in a random sample of size 500. Test the Ho: p1 = p2 (that the two processes yield equal proportions of defectives) against the HA: p1 ≠ p2 at 0.05 level of significance. What is the computed value & decision? Select one: a. -1.975, Ho Rejected b. 1.975, Ho Rejected c. -1.975, Ho Accepted

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