Let n1 =40. X1 = 30, n2 = 40, and X2 = 20. Complete parts {a} and (b) below. Determine the null and alternative hypotheses. Choose the correct answer below. OA. H0:1I:151I:2 C) B. H0:I1=1r2 H1:1I:1>1p2 H1:I1x2 OC. H0:1I:121I:2 O D. H0:I1x2 H1:JI:11D2 H1:I1=1r2 Calculate the test statistic, ZSTAT, based on the difference p1 p2. The test statistic, ZSTAT. is (Type an integer or a decimal. Round to two decimal places as needed.) Calculate the pvalue. The p-yalue is . (Type an integer or a decimal. Round to three decimal places as needed.)